# Shintaro Mochizuki

Shintaro Mochizuki (Japanese: 望月 慎太郎, Mochizuki Shintarō, born 2 June 2003) is a Japanese professional tennis player. He has an ATP career-high singles ranking of world No. 129 achieved on 6 November 2023 and a doubles ranking of No. 371 achieved on 18 October 2021. He is currently the No. 4 player from Japan.
As a teen, Mochizuki achieved a career-high ITF junior combined ranking of No. 1 on 15 July 2019.

## Early life

Shintaro Mochizuki was born on June 2, 2003, in Kawasaki, Kanagawa, Japan. His name "Shintaro" was given by his father, inspired by the novelist and politician Shintaro Ishihara.
He started playing tennis at the age of 3. As a fifth grader, he represented Kawasaki Municipal Mukai Elementary School at the 32nd First Life National Elementary School Tennis Championship and managed to reach the semifinals.
At the age of 12, he passed the selection test for the Masaaki Morita Tennis Fund and went to the United States to train at the IMG Academy in Florida. He began attending N High School in 2019.

## Career
### 2019: Juniors

Mochizuki won the 2019 Wimbledon Championships – Boys' singles title after becoming the first Japanese male to reach a Grand Slam juniors singles final. In September that year, he led the Japanese team to win the Junior Davis Cup in Orlando, Florida.

### 2021: ATP and Masters debuts

In February, Mochizuki made his ATP main draw debut as a wildcard at the 2021 Singapore Tennis Open where he lost to Altug Celikbilek in straight sets.
In March, he qualified for his first ATP Masters 1000 main draw at the 2021 Miami Open having been given a wildcard for the qualifying competition.

### 2023: Maiden Challenger, Major debut, first ATP wins & semifinal, top 130

He won his first-ever trophy as a professional by winning the Open Città della Disfida Challenger in Barletta, Italy, defeating the Argentine Santiago Rodriguez Taverna in straight sets.
He reached the top 200 at world No. 198 on 12 June 2023. In July, he made his Grand Slam debut after qualifying for the main draw of the 2023 Wimbledon Championships but lost in the first round to 16th seed Tommy Paul in straight sets. At the 2023 Hall of Fame Open he lost to Liam Broady also in the first round.
Ranked No. 215, he received a wildcard for the ATP 500 Japan Open. After nine attempts, he finally won his first match at the ATP Tour level, beating Tomás Martín Etcheverry in straight sets. Next he defeated top seed Taylor Fritz for his first top-10 win, to reach his first ATP tour-level quarterfinal. In the quarterfinals, he defeated Alexei Popyrin to reach his first-ever semifinal. He became the lowest-ranked Tokyo semifinalist since then-World No. 479 Kelly Jones in 1986. As a result, he moved up more than 80 positions to World No. 131 in the rankings on 23 October 2023. Following a quarterfinal showing at the Sydney Challenger he reached the top 130 in the rankings and 13th in the 2023 Next Generation ATP Finals race.

### 2024-2025: Australian and French Open debuts

He made his debut in the main draw at the 2024 Australian Open as a lucky loser but lost to Tomáš Macháč in straight sets.
He also qualified for the main draw at the 2024 French Open.
Mochizuki won his second Challenger at the 2025 Open Nouvelle-Calédonie title defeating Moerani Bouzige in straight sets.

## ATP Challenger Tour finals
### Singles: 3 (2 titles, 1 runner-up)

* Legend
* ATP Challenger Tour (2–1)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Win | 1–0 | Apr 2023 | Barletta, Italy | Challenger | Clay | Santiago Rodríguez Taverna | 6–1, 6–4 |
| Win | 2–0 | Jan 2025 | Nouméa, New Caledonia | Challenger | Hard | Moerani Bouzige | 6–1, 6–3 |
| Loss | 2–1 | Feb 2025 | Bengaluru Open, India | Challenger | Hard | Brandon Holt | 3–6, 3–6 |

### Doubles: 2 (1 title, 1 runner-up)

* Legend
* ATP Challenger Tour (1–1)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Loss | 0–1 | Feb 2020 | Cuernavaca, Mexico | Challenger | Hard | Carlos Gómez-Herrera | Luke Saville John-Patrick Smith | 3–6, 7–6$^{(7–4)}$, [5–10] |
| Win | 1–1 | Jan 2023 | Tenerife II, Spain | Challenger | Hard | Christian Harrison | Francesco Passaro Matteo Gigante | 6–4, 6–3 |

## ITF World Tennis Tour finals
### Singles: 1 (1 runner-up)

* Legend
* ITF WTT (0–1)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Aug 2021 | M25 Grodzisk Mazowiecki, Poland | WTT | Clay | Zsombor Piros | 3–6, 6–7$^{(3–7)}$ |

### Doubles: 7 (7 titles)

* Legend
* ITF WTT (7–0)
* Finals by surface
* Hard (7–0)
* Clay (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Aug 2019 | M15 Cancún, Mexico | WTT | Hard | Thiago Agustín Tirante | Isaac Stoute Brandon Walkin | 6–7$^{(4–7)}$, 7–5, [10–4] |
| Win | 2–0 | Oct 2019 | M15 Changwon, South Korea | WTT | Hard | Naoki Nakagawa | Chung Hong Lee Jea-moon | 6–4, 6–4 |
| Win | 3–0 | Jan 2020 | M15 Cancún, Mexico | WTT | Hard | Alejo Lorenzo Lingua Lavallén | Tanner Smith Jordi Arconada | walkover |
| Win | 4–0 | Oct 2020 | M15 Sharm El Sheikh, Egypt | WTT | Hard | Rio Noguchi | Ryan Nijboer Gijs Brouwer | 6–2, 7–5 |
| Win | 5–0 | Nov 2020 | M15 Santo Domingo, Dominican Republic | WTT | Hard | Nick Hardt | Gonzalo Lama Antonio Cayetano March | 6–3, 6–3 |
| Win | 6–0 | Dec 2020 | M15 Santo Domingo, Dominican Republic | WTT | Hard | Nick Hardt | Nick Chappell Keegan Smith | 4–6, 7–6$^{(7–2)}$, [10–5] |
| Win | 7–0 | Apr 2021 | M15 Antalya, Turkey | WTT | Hard | Rio Noguchi | Constantin Schmitz Benjamin Hassan | 7–6$^{(7–2)}$, 6–2 |

## Junior Grand Slam finals
### Singles: 1 (1 title)

| Result | Year | Tournament | Surface | Opponent | Score |
| Win | 2019 | Wimbledon | Grass | Carlos Gimeno Valero | 6–3, 6–2 |

## Wins over top 10 players

* He has a 1–1 win-loss record against players who were, at the time the match was played, ranked in the top 10.
| Season | 2023 | Total |
| Wins | 1 | 1 |
| # | Player | Rank | Event | Surface | Rd | Score | SMR |
| 2023 ||||||||
| 1. | Taylor Fritz | 10 | Japan Open, Japan | Hard | 2R | 0–6, 6–4, 7–6$^{(7–2)}$ | 215 |
    *As of 26 May 2024