# 2018 Simona Halep tennis season

The 2018 Simona Halep tennis season officially began on 1 January 2018 with the start of the 2018 WTA Tour. Simona Halep entered the season as the No. 1 ranked player in the world.

## Year in detail
### Early hard court season and Australian Open
#### Shenzhen Open

Halep began her season at the Shenzhen Open. She was the top seed and advanced to the final after successfully defeating Nicole Gibbs, Duan Yingying, Aryna Sabalenka and Irina-Camelia Begu. She defeated her in the opponent's final that eliminated her one year ago in R16 in three sets, Kateřina Siniaková.

#### Australian Open

Her next tournament was the Australian Open. She was the main draw favorite for the first time in a Grand Slam career. She defeated Destanee Aiava in straight sets, still in the first round injured at the right leg's ankle. She then beat Eugenie Bouchard, former world rank 5, Lauren Davis in an epic match that lasted 3 hours and 45 minutes taking the third set 15–13. The match equaled the Australian Open record for most games played in a women's singles draw match at 48 — equaling Chanda Rubin's 1996 quarterfinal win over Arantxa Sánchez Vicario. She went on to defeat Naomi Osaka in the 4th round in straight sets and former world No. 1 Karolína Plíšková in the quarter-finals, also in straight sets. She faced former world No. 1 and 2016 Australian Open champion Angelique Kerber in the semi-finals. In the 3rd set, she saved two match points and went on to win, qualifying for the Australian Open final for the first time.
In the final, Halep was defeated by Caroline Wozniacki in three sets.
After Australian Open fell to second place for four weeks.

#### Qatar Ladies Open

Halep then played the Qatar Open, where she received a bye in the first round. She defeated Ekaterina Makarova with a bagel in the second set. The Australian Open finalist put together a dominant performance and needed just 58 minutes. She then defeated Anastasija Sevastova, seed 13 in straight sets. Her next opponent was American, CiCi Bellis. The first set was won by a bagel. In semifinal should have played with, but withdrawing prior to her match against Garbiñe Muguruza because of a right foot injury. Nevertheless, despite not playing the next week, she returned to the top spot.

### March sunshine events
#### Indian Wells Masters

Halep then played the Indian Wells Masters, where she received a bye in the first round. She defeated Kristýna Plíšková in straight sets, Caroline Dolehide in three sets, Wang Qiang in straight sets and Petra Martić in three sets, in straight sets before she lost to Naomi Osaka again in the semifinal.

#### Miami Open

Halep then entered the Miami Open, where she also received a bye in the first round. In round 2 beat French Océane Dodin in three sets. However, she lost in the third round to 2012 champion Agnieszka Radwańska.

### European clay court season
#### Fed Cup, World Group-Play Off

She kicked off her clay court campaign by leading Romania against Switzerland in their World Group Play-off tie in Cluj-Napoca. By virtue of a 3–1 victory with Halep going 2–0 in the singles rubbers, they secured a place in the 2019 World Group for the first time in two years.

#### Porsche Tennis Grand Prix

After Fed Cup, Halep went to Stuttgart where she knocked a victory on Magdaléna Rybáriková before losing to quarters at CoCo Vandeweghe

#### Mutua Madrid Open

Halep then played the Madrid Open. She defeated Ekaterina Makarova, giving up just one game, Elise Mertens with a bagel in first set, Kristýna Plíšková and advanced into the quarterfinals. However, she lost Karolína Plíšková in straight sets, after winning the last two editions and after having only 15 victories in a row.

#### Italian Open

Halep's next tournament was the Italian Open, where she received a bye in the first round. She defeated Naomi Osaka, winner at Indian Wells, yielding a single game. In the third round should have played with Madison Keys, but the latter had to retire due to a shoulder injury, so Simona qualified in the quarter-finals without playing in round 3. In the quarter-finals defeated Caroline Garcia, the 7th World Player, with only 5 games. In semifinal has marred one of her rivals Russian, Maria Sharapova winning editions of 2011, 2012 and 2015 in an epic match. Simona won in 3 sets after losing the first set. In the final she lost to the same opponent last year, Elina Svitolina. She lost the first set to 0.

#### French Open

In the French Open, Halep was the 1st seed for the second time in a Grand Slam. In the first round, she defeated Alison Riske losing the first set. She was forced to compete on the 4th day on Wednesday after the match was postponed due to the dark. In the second round, she easily defeated the American wildcard Taylor Townsend. Her opponent in the third round was the 2014 semi-finalist, Andrea Petkovic. Halep defeated the German in straight sets, not losing a game in the second set. Her next opponent was the 16th seed Elise Mertens, who she defeated in 59 minutes, dropping just 3 games. In the quarterfinals, she met Kerber in a rematch of the Australian Open semifinal, and defeated her once again in three sets.. In the semi-final she met former world No. 1 and French Open champion Garbiñe Muguruza, and defeated her in straight sets. In the final, Halep met Sloane Stephens, and came back from a set deficit to win her first Grand Slam title, on her fourth attempt. She became the first Romanian woman to win a Grand Slam title since Virginia Ruzici won the French Open in 1978.

## All matches

Key :
| W | F | SF | QF | #R | RR | Q# | P# | DNQ | A | Z# | PO | G | S | B | NMS | NTI | P | NH |

### Singles matches

| Tournament | Match | Round | Opponent | Rank | Result | Score |
| Shenzhen Open Shenzhen, China WTA International Hard, outdoor 1–7 January 2018 | 1 | 1R | Nicole Gibbs | 110 | Win | 6–4, 6–1 |
| Shenzhen Open Shenzhen, China WTA International Hard, outdoor 1–7 January 2018 | 2 | 2R | Duan Yingying | 91 | Win | 3−6, 6–1, 6–2 |
| Shenzhen Open Shenzhen, China WTA International Hard, outdoor 1–7 January 2018 | 3 | QF | Aryna Sabalenka | 73 | Win | 6–2, 6–2 |
| Shenzhen Open Shenzhen, China WTA International Hard, outdoor 1–7 January 2018 | 4 | SF | Irina-Camelia Begu (4) | 43 | Win | 6–1, 6–4 |
| Shenzhen Open Shenzhen, China WTA International Hard, outdoor 1–7 January 2018 | 5 | W | Kateřina Siniaková (6) | 47 | Win (1) | 6–1, 2–6, 6–0 |
| Australian Open Melbourne, Australia Grand Slam Hard, outdoor 15–28 January 2018 | 6 | 1R | Destanee Aiava (WC) | 193 | Win | 7–6$^{(7–5)}$, 6–1 |
| Australian Open Melbourne, Australia Grand Slam Hard, outdoor 15–28 January 2018 | 7 | 2R | Eugenie Bouchard | 112 | Win | 6–2, 6–2 |
| Australian Open Melbourne, Australia Grand Slam Hard, outdoor 15–28 January 2018 | 8 | 3R | Lauren Davis | 76 | Win | 4–6, 6–4, 15–13 |
| Australian Open Melbourne, Australia Grand Slam Hard, outdoor 15–28 January 2018 | 9 | 4R | Naomi Osaka | 72 | Win | 6–3, 6–2 |
| Australian Open Melbourne, Australia Grand Slam Hard, outdoor 15–28 January 2018 | 10 | QF | Karolína Plíšková (6) | 6 | Win | 6–3, 6–2 |
| Australian Open Melbourne, Australia Grand Slam Hard, outdoor 15–28 January 2018 | 11 | SF | Angelique Kerber (21) | 16 | Win | 6–3, 4–6, 9–7 |
| Australian Open Melbourne, Australia Grand Slam Hard, outdoor 15–28 January 2018 | 12 | F | Caroline Wozniacki (2) | 2 | Loss (1) | 6–7$^{(2–7)}$, 6–3, 4–6 |
| Qatar Open Doha, Qatar WTA Premier 5 Hard, outdoor 12–17 February 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Qatar Open Doha, Qatar WTA Premier 5 Hard, outdoor 12–17 February 2018 | 13 | 2R | Ekaterina Makarova | 36 | Win | 6–1, 6–0 |
| Qatar Open Doha, Qatar WTA Premier 5 Hard, outdoor 12–17 February 2018 | 14 | 3R | Anastasija Sevastova (13) | 15 | Win | 6–4, 6–3 |
| Qatar Open Doha, Qatar WTA Premier 5 Hard, outdoor 12–17 February 2018 | 15 | QF | CiCi Bellis | 48 | Win | 6–0, 6–4 |
| Qatar Open Doha, Qatar WTA Premier 5 Hard, outdoor 12–17 February 2018 | - | SF | Garbiñe Muguruza (4) | 4 | Withdrew | N/A |
| Indian Wells Open Indian Wells, United States WTA Premier Mandatory Hard, outdoor 5–18 March 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Indian Wells Open Indian Wells, United States WTA Premier Mandatory Hard, outdoor 5–18 March 2018 | 16 | 2R | Kristýna Plíšková | 77 | Win | 6–4, 6–4 |
| Indian Wells Open Indian Wells, United States WTA Premier Mandatory Hard, outdoor 5–18 March 2018 | 17 | 3R | Caroline Dolehide (WC) | 165 | Win | 1–6, 7–6$^{(7–3)}$, 6–2 |
| Indian Wells Open Indian Wells, United States WTA Premier Mandatory Hard, outdoor 5–18 March 2018 | 18 | 4R | Wang Qiang | 55 | Win | 7–5, 6–1 |
| Indian Wells Open Indian Wells, United States WTA Premier Mandatory Hard, outdoor 5–18 March 2018 | 19 | QF | Petra Martić | 51 | Win | 6–4, 6–7$^{(5–7)}$, 6–3 |
| Indian Wells Open Indian Wells, United States WTA Premier Mandatory Hard, outdoor 5–18 March 2018 | 20 | SF | Naomi Osaka | 44 | Loss | 3–6, 0–6 |
| Miami Open Miami, United States WTA Premier Mandatory Hard, outdoor 19 March – 1 April 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Miami Open Miami, United States WTA Premier Mandatory Hard, outdoor 19 March – 1 April 2018 | 21 | 2R | Océane Dodin (WC) | 98 | Win | 3–6, 6–3, 7–5 |
| Miami Open Miami, United States WTA Premier Mandatory Hard, outdoor 19 March – 1 April 2018 | 22 | 3R | Agnieszka Radwańska (30) | 32 | Loss | 6–3, 2–6, 3–6 |
| Fed Cup WG Play-offs: Switzerland vs. Romania Cluj-Napoca, Romania Fed Cup Clay, indoor 21–22 April 2018 | 23 | - | Viktorija Golubic | 115 | Win | 6–3, 1–6, 6–1 |
| Fed Cup WG Play-offs: Switzerland vs. Romania Cluj-Napoca, Romania Fed Cup Clay, indoor 21–22 April 2018 | 24 | - | Patty Schnyder | 149 | Win | 6–2, 6–1 |
| Stuttgart Open Stuttgart, Germany WTA Premier Clay, indoor 23–29 April 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Stuttgart Open Stuttgart, Germany WTA Premier Clay, indoor 23–29 April 2018 | 25 | 2R | Magdaléna Rybáriková | 18 | Win | 4–6, 6–2, 6–3 |
| Stuttgart Open Stuttgart, Germany WTA Premier Clay, indoor 23–29 April 2018 | 26 | QF | CoCo Vandeweghe (WC) | 16 | Loss | 4–6, 1–6 |
| Madrid Open Madrid, Spain WTA Premier Mandatory Clay, outdoor 7–13 May 2018 | 27 | 1R | Ekaterina Makarova | 33 | Win | 6–1, 6–0 |
| Madrid Open Madrid, Spain WTA Premier Mandatory Clay, outdoor 7–13 May 2018 | 28 | 2R | Elise Mertens | 16 | Win | 6–0, 6–3 |
| Madrid Open Madrid, Spain WTA Premier Mandatory Clay, outdoor 7–13 May 2018 | 29 | 3R | Kristýna Plíšková (Q) | 94 | Win | 6–4, 6–1 |
| Madrid Open Madrid, Spain WTA Premier Mandatory Clay, outdoor 7–13 May 2018 | 30 | QF | Karolína Plíšková (6) | 6 | Loss | 4–6, 3–6 |
| Italian Open Rome, Italy WTA Premier 5 Clay, outdoor 14–20 May 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Italian Open Rome, Italy WTA Premier 5 Clay, outdoor 14–20 May 2018 | 31 | 2R | Naomi Osaka | 21 | Win | 6–1, 6–0 |
| Italian Open Rome, Italy WTA Premier 5 Clay, outdoor 14–20 May 2018 | - | 3R | Madison Keys (13) | 14 | Win | w/o |
| Italian Open Rome, Italy WTA Premier 5 Clay, outdoor 14–20 May 2018 | 32 | QF | Caroline Garcia (7) | 7 | Win | 6–2, 6–3 |
| Italian Open Rome, Italy WTA Premier 5 Clay, outdoor 14–20 May 2018 | 33 | SF | Maria Sharapova | 40 | Win | 4–6, 6–1, 6–4 |
| Italian Open Rome, Italy WTA Premier 5 Clay, outdoor 14–20 May 2018 | 34 | F | Elina Svitolina (4) | 4 | Loss (2) | 0–6, 4–6 |
| French Open Paris, France Grand Slam Clay, outdoor 27 May – 10 June 2018 | 35 | 1R | Alison Riske | 83 | Win | 2–6, 6–1, 6–1 |
| French Open Paris, France Grand Slam Clay, outdoor 27 May – 10 June 2018 | 36 | 2R | Taylor Townsend (WC) | 72 | Win | 6–3, 6–1 |
| French Open Paris, France Grand Slam Clay, outdoor 27 May – 10 June 2018 | 37 | 3R | Andrea Petkovic | 107 | Win | 7–5, 6–0 |
| French Open Paris, France Grand Slam Clay, outdoor 27 May – 10 June 2018 | 38 | 4R | Elise Mertens (16) | 16 | Win | 6–2, 6–1 |
| French Open Paris, France Grand Slam Clay, outdoor 27 May – 10 June 2018 | 39 | QF | Angelique Kerber (12) | 12 | Win | 6–7$^{(3–7)}$, 6–3, 6–2 |
| French Open Paris, France Grand Slam Clay, outdoor 27 May – 10 June 2018 | 40 | SF | Garbiñe Muguruza (3) | 3 | Win | 6–1, 6–4 |
| French Open Paris, France Grand Slam Clay, outdoor 27 May – 10 June 2018 | 41 | W | Sloane Stephens (10) | 10 | Win (2) | 3–6, 6–4, 6–1 |
| Wimbledon Championships London, United Kingdom Grand Slam Grass, outdoor 2–15 July 2018 | 42 | 1R | Kurumi Nara | 100 | Win | 6–2, 6–4 |
| Wimbledon Championships London, United Kingdom Grand Slam Grass, outdoor 2–15 July 2018 | 43 | 2R | Zheng Saisai | 126 | Win | 7–5, 6–0 |
| Wimbledon Championships London, United Kingdom Grand Slam Grass, outdoor 2–15 July 2018 | 44 | 3R | Hsieh Su-wei | 48 | Loss | 6–3, 4–6, 5–7 |
| Canadian Open Montreal, Canada WTA Premier 5 Hard, outdoor 6–12 August 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Canadian Open Montreal, Canada WTA Premier 5 Hard, outdoor 6–12 August 2018 | 45 | 2R | Anastasia Pavlyuchenkova | 28 | Win | 7–6$^{(11–9)}$, 4–6, 7–5 |
| Canadian Open Montreal, Canada WTA Premier 5 Hard, outdoor 6–12 August 2018 | 46 | 3R | Venus Williams (13) | 14 | Win | 6–2, 6–2 |
| Canadian Open Montreal, Canada WTA Premier 5 Hard, outdoor 6–12 August 2018 | 47 | QF | Caroline Garcia (6) | 6 | Win | 7–5, 6–1 |
| Canadian Open Montreal, Canada WTA Premier 5 Hard, outdoor 6–12 August 2018 | 48 | SF | Ashleigh Barty (15) | 16 | Win | 6–4, 6–1 |
| Canadian Open Montreal, Canada WTA Premier 5 Hard, outdoor 6–12 August 2018 | 49 | W | Sloane Stephens (3) | 3 | Win (3) | 7–6$^{(8–6)}$, 3–6, 6–4 |
| Cincinnati Open Cincinnati, United States WTA Premier 5 Hard, outdoor 13–19 August 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Cincinnati Open Cincinnati, United States WTA Premier 5 Hard, outdoor 13–19 August 2018 | 50 | 2R | Ajla Tomljanović (Q) | 58 | Win | 4–6, 6–3, 6–3 |
| Cincinnati Open Cincinnati, United States WTA Premier 5 Hard, outdoor 13–19 August 2018 | 51 | 3R | Ashleigh Barty (16) | 16 | Win | 7–5, 6–4 |
| Cincinnati Open Cincinnati, United States WTA Premier 5 Hard, outdoor 13–19 August 2018 | 52 | QF | Lesia Tsurenko | 44 | Win | 6–4, 6–1 |
| Cincinnati Open Cincinnati, United States WTA Premier 5 Hard, outdoor 13–19 August 2018 | 53 | SF | Aryna Sabalenka | 34 | Win | 6–3, 6–4 |
| Cincinnati Open Cincinnati, United States WTA Premier 5 Hard, outdoor 13–19 August 2018 | 54 | F | Kiki Bertens | 17 | Loss (3) | 6–2, 6–7$^{(6–8)}$, 2–6 |
| Connecticut Open New Haven, United States WTA Premier Hard, outdoor 20–26 August 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Connecticut Open New Haven, United States WTA Premier Hard, outdoor 20–26 August 2018 | – | 2R | Camila Giorgi | 45 | Withdrew | N/A |
| U.S. Open New York City, United States Grand Slam Hard, outdoor 27 August – 9 September 2018 | 55 | 1R | Kaia Kanepi | 44 | Loss | 2–6, 4–6 |
| Wuhan Open Wuhan, China WTA Premier 5 Hard, outdoor 23–29 September 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Wuhan Open Wuhan, China WTA Premier 5 Hard, outdoor 23–29 September 2018 | 56 | 2R | Dominika Cibulková | 31 | Loss | 0–6, 5–7 |
| China Open Beijing, China WTA Premier Mandatory Hard, outdoor 1–7 October 2018 | 57 | 1R | Ons Jabeur (Q) | 116 | Loss | 1–6, retired |
| Kremlin Cup Moscow, Russia WTA Premier Hard, indoor 15–21 October 2018 |
| Kremlin Cup Moscow, Russia WTA Premier Hard, indoor 15–21 October 2018 | – | 1R | Bye | Bye | Bye | Bye |
| Kremlin Cup Moscow, Russia WTA Premier Hard, indoor 15–21 October 2018 | – | 2R | Anastasia Pavlyuchenkova | 40 | Withdrew | N/A |

## Tournament schedule
### Singles schedule

Halep's 2018 singles tournament schedule is as follows:
| Date | Championship | Location | Category | Surface | 2017 result | 2017 points | 2018 points | Outcome |
| 1 January – 7 January | Shenzhen Open | Shenzhen | International | Hard | 2R | 30 | 280 | Winner defeated Kateřina Siniaková 6–1, 2–6, 6–0 |
| 15 January – 28 January | Australian Open | Melbourne | Grand Slam | Hard | 1R | 10 | 1300 | Final lost to Caroline Wozniacki 6–7$^{(2–7)}$, 6–3, 4–6 |
| 12 February – 17 February | Qatar Open | Doha | Premier 5 | Hard | DNP | 0 | 350 | Semifinals withdrew to Garbiñe Muguruza N/A |
| 5 March – 18 March | Indian Wells Open | Indian Wells | Premier Mandatory | Hard | 3R | 65 | 390 | Semifinals lost to Naomi Osaka 3–6, 0–6 |
| 19 March – 1 April | Miami Open | Miami | Premier Mandatory | Hard | QF | 215 | 65 | Third round lost to Agnieszka Radwańska 6–3, 2–6, 3–6 |
| 23 April – 29 April | Stuttgart Open | Stuttgart | Premier | Clay (i) | SF | 185 | 100 | Quarterfinals lost to CoCo Vandeweghe 4–6, 1–6 |
| 7 May – 13 May | Madrid Open | Madrid | Premier Mandatory | Clay | W | 1000 | 215 | Quarterfinals lost to Karolína Plíšková 4–6, 3–6 |
| 14 May – 20 May | Italian Open | Rome | Premier 5 | Clay | F | 585 | 585 | Final lost to Elina Svitolina 0–6, 4–6 |
| 27 May – 10 June | French Open | Paris | Grand Slam | Clay | F | 1300 | 2000 | Winner defeated Sloane Stephens 3–6, 6–4, 6–1 |
| 2 July – 15 July | Wimbledon | London | Grand Slam | Grass | QF | 430 | 130 | Third round lost to Hsieh Su-wei 6–3, 4–6, 5–7 |
| 6 August – 12 August | Canadian Open | Montréal | Premier 5 | Hard | SF | 350 | 900 | Winner defeated Sloane Stephens 7–6$^{(8–6)}$, 3–6, 6–4 |
| 13 August – 19 August | Cincinnati Open | Cincinnati | Premier 5 | Hard | F | 585 | 585 | Final lost to Kiki Bertens 6–2, 6–7$^{(6–8)}$, 2–6 |
| 20 August – 25 August | Connecticut Open | New Haven | Premier | Hard | DNP | 0 | 0 | Withdrew due to injuries to achilles tendon |
| 27 August – 9 September | US Open | New York City | Grand Slam | Hard | 1R | 10 | 10 | First round lost to Kaia Kanepi 2–6, 4–6 |
| 23 September – 29 September | Wuhan Open | Wuhan | Premier 5 | Hard | 2R | 1 | 1 | Second round lost to Dominika Cibulková 0–6, 5–7 |
| 1 October – 7 October | China Open | Beijing | Premier Mandatory | Hard | F | 650 | 10 | First round lost to Ons Jabeur 1–6, retired |
| 15 October – 21 October | Kremlin Cup | Moscow | Premier | Hard | DNP | 0 | 0 | Withdrew due to injuries to back injury |
| Road to Singapore points as of 2018 China Open | Road to Singapore points as of 2018 China Open | Road to Singapore points as of 2018 China Open | Road to Singapore points as of 2018 China Open | Road to Singapore points as of 2018 China Open | Road to Singapore points as of 2018 China Open | 5675 | 6921 | 1246 difference |
| Total year-end points | Total year-end points | Total year-end points | Total year-end points | Total year-end points | Total year-end points | 6175 | 6921 | 746 difference |

## Yearly records
### Head-to-head matchups

| Surface | Win–loss | Win% |
| Hard | 28–6 | 82.35% |
| Clay | 16–3 | 84.21% |
| Grass | 2–1 | 66.67% |
| Overall | 46–10 | 82.14% |
Players are ordered by letter. (Bold denotes a top 10 player at the time of the most recent match between the two players, Italic denotes top 50.)
* Angelique Kerber 2–0
* Aryna Sabalenka 2–0
* Ashleigh Barty 2–0
* Caroline Garcia 2–0
* Ekaterina Makarova 2–0
* Elise Mertens 2–0
* Kristýna Plíšková 2–0
* Sloane Stephens 2–0
* Ajla Tomljanović 1–0
* Alison Riske 1–0
* Anastasia Pavlyuchenkova 1–0
* Anastasija Sevastova 1–0
* Andrea Petkovic 1–0
* Caroline Dolehide 1–0
* CiCi Bellis 1–0
* Destanee Aiava 1–0
* Duan Yingying 1–0
* Eugenie Bouchard 1–0
* Garbiñe Muguruza 1–0
* Irina-Camelia Begu 1–0
* Kateřina Siniaková 1–0
* Kurumi Nara 1–0
* Lauren Davis 1–0
* Lesia Tsurenko 1–0
* Magdaléna Rybáriková 1–0
* Maria Sharapova 1–0
* Nicole Gibbs 1–0
* Océane Dodin 1–0
* Patty Schnyder 1–0
* Petra Martić 1–0
* Taylor Townsend 1–0
* Venus Williams 1–0
* Viktorija Golubic 1–0
* Wang Qiang 1–0
* Saisai Zheng 1–0
* Karolína Plíšková 1–1
* Naomi Osaka 1–1
* Agnieszka Radwańska 0–1
* Caroline Wozniacki 0–1
* CoCo Vandeweghe 0–1
* Dominika Cibulková 0–1
* Elina Svitolina 0–1
* Hsieh Su-wei 0–1
* Kaia Kanepi 0–1
* Kiki Bertens 0–1
* Ons Jabeur 0–1

### Top 10 wins

| # | Player | Rank | Tournament | Surface | Round | Score | SHR |
| 1. | Karolína Plíšková | 6 | Australian Open, Australia | Hard | Quarterfinals | 6–3, 6–2 | 1 |
| 2. | Caroline Garcia | 7 | Italian Open, Italy | Clay | Quarterfinals | 6–2, 6–3 | 1 |
| 3. | Garbiñe Muguruza | 3 | French Open, France | Clay | Semifinals | 6–1, 6–4 | 1 |
| 4. | Sloane Stephens | 10 | French Open, France | Clay | Final | 3–6, 6–4, 6–1 | 1 |
| 5. | Caroline Garcia | 6 | Canadian Open, Canada | Hard | Quarterfinals | 7–5, 6–1 | 1 |
| 6. | Sloane Stephens | 3 | Canadian Open, Canada | Hard | Final | 7–6$^{(8–6)}$, 3–6, 6–4 | 1 |

### Finals

Singles: 6 (3 titles, 3 runner-ups)
* Legend
* Grand Slam tournaments (1–1)
* WTA Tour Championships (0–0)
* Premier Mandatory & Premier 5 (1–2)
* Premier (0–0)
* International (1–0)
* Finals by surface
* Hard (2–2)
* Clay (1–1)
* Grass (0–0)
* Titles by setting
* Outdoors (3–2)
* Indoors (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Win | 1–0 | Jan 2018 | Shenzhen Open, China | International | Hard | Katerina Siniaková | 6–1, 2–6, 6–0 |
| Loss | 1–1 | Jan 2018 | Australian Open, Australia | Grand Slam | Hard | Caroline Wozniacki | 6–7$^{(2–7)}$, 6–3, 4–6 |
| Loss | 1–2 | May 2018 | Italian Open, Italy | Premier 5 | Clay | Elina Svitolina | 0–6, 4–6 |
| Win | 2–2 | Jun 2018 | French Open, France | Grand Slam | Clay | Sloane Stephens | 3–6, 6–4, 6–1 |
| Win | 3–2 | Aug 2018 | Canadian Open, Canada | Premier 5 | Hard | Sloane Stephens | 7–6$^{(8–6)}$, 3–6, 6–4 |
| Loss | 3–3 | Aug 2018 | Cincinnati Open, USA | Premier 5 | Hard | Kiki Bertens | 6–2, 6–7$^6$, 2–6 |

### Earnings

The tournaments won by Halep are in boldface.
| # | Tournament | Prize money | Year-to-date |
| 1. | Shenzhen Open | US$163,260 | $163,260 |
| 2. | Australian Open | A$2,000,000 | $1,680,732 |
| 3. | Qatar Open | $147,750 | $1,680,879 |
| 4. | Indian Wells Masters | $327,965 | $2,008,844 |
| 5. | Miami Open | $47,170 | $2,056,014 |
| 6. | Stuttgart Open | €16,411 | $2,077,509 |
| 7. | Mutua Madrid Open | €149,390 | $2,253,877 |
| 8. | Italian Open | €253,425 | $2,568,124 |
| 9. | French Open | €2,200,000 | $5,345,777 |
| 10. | Wimbledon Championships | £100,000 | $5,483,511 |
| 11. | Rogers Cup | $521,825 | $6,005,336 |
| 12. | Cincinnati Open | $243,920 | $6,249,256 |
| – | Connecticut Open | — | $6,249,256 |
| 13. | US Open | $ | $ |
| Total prize money | Total prize money | Total prize money | $6,249,256 |