# 2021 Adelaide International – Singles

Ashleigh Barty was the defending champion, but she lost in the second round to Danielle Collins, in a rematch of the previous year's semifinal.
Iga Świątek won the title, defeating Belinda Bencic in the final, 6–2, 6–2. Świątek did not drop a set throughout the entire tournament.

## Seeds

The top four seeds received a bye into the second round.
* Ashleigh Barty (second round)
* Belinda Bencic (final)
* Johanna Konta (second round)
* Elise Mertens (withdrew)
* Iga Świątek (champion)
* Petra Martić (second round)
* Yulia Putintseva (second round)
* Wang Qiang (second round)

## Draw
### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 5 | Iga Świątek | 6 | 6 | | | | | |
| | Jil Teichmann | 3 | 2 | | | | | |
| | Jil Teichmann | 3 | 2 | | 5 | Iga Świątek | 6 | 6 |
| | | | | | 2 | Belinda Bencic | 2 | 2 |
| Q | Coco Gauff | 6$^2$ | 7$^7$ | 2 | 2 | Belinda Bencic | 2 | 2 |
| 2 | Belinda Bencic | 7$^7$ | 6$^4$ | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1/WC | A Barty | 3 | 4 | | | | | | | | | | |
| | S Zheng | 6$^5$ | 1 | | | D Collins | 6 | 6 | | | | | | | | | | |
| | D Collins | 7$^7$ | 6 | | | | | | | | D Collins | 2 | 0$^r$ | | | | | |
| WC | S Stosur | 7 | 5 | 4 | | | | | | 5 | I Świątek | 6 | 3 | | | | | |
| Q | M Inglis | 5 | 7 | 6 | Q | M Inglis | 1 | 3 | | | | | | | | | | |
| Q | M Brengle | 3 | 4 | | 5 | I Świątek | 6 | 6 | | | | | | | | | | |
| 5 | I Świątek | 6 | 6 | | | | | | | | | | | | 5 | I Świątek | 6 | 6 |
| | | | | | | | | | | | | | | | | J Teichmann | 3 | 2 |
| | | | | | LL | C McHale | 4 | 1 | | | | | | | | | | |
| | A Sevastova | 6 | 6 | | | A Sevastova | 6 | 6 | | | | | | | | | | |
| | C Garcia | 2 | 4 | | | | | | | | A Sevastova | 4 | 7$^{10}$ | 5 | | | | |
| | J Teichmann | 6 | 7$^7$ | | | | | | | | J Teichmann | 6 | 6$^8$ | 7 | | | | |
| | K Mladenovic | 2 | 6$^5$ | | | J Teichmann | 3 | 6 | 6 | | | | | | | | | |
| WC | O Gadecki | 4 | 3 | | 8 | Q Wang | 6 | 3 | 3 | | | | | | | | | |
| 8 | Q Wang | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | P Martić | 4 | 6 | 7 | | | | | | | | | | | | | | | |
| Q | L Samsonova | 6 | 0 | 5 | 6 | P Martić | 7 | 3 | 4 | | | | | | | | | | |
| Q | J Paolini | 4 | 7$^7$ | 2 | Q | C Gauff | 5 | 6 | 6 | | | | | | | | | | |
| Q | C Gauff | 6 | 6$^4$ | 6 | | | | | | Q | C Gauff | 2 | 6 | 6 | | | | | |
| | S Rogers | 6 | 7$^7$ | | | | | | | | S Rogers | 6 | 4 | 4 | | | | | |
| | V Kudermetova | 3 | 6$^4$ | | | S Rogers | 6 | 6 | | | | | | | | | | | |
| | | | | | 3 | J Konta | 2 | 2 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | Q | C Gauff | 6$^2$ | 7$^7$ | 2 |
| 7 | Y Putintseva | 6 | 6 | | | | | | | | | | | | 2 | B Bencic | 7$^7$ | 6$^4$ | 6 |
| | L Siegemund | 4 | 4 | | 7 | Y Putintseva | 4 | 7 | 1 | | | | | | | | | | |
| Q | S Sanders | 6 | 6 | | Q | S Sanders | 6 | 5 | 6 | | | | | | | | | | |
| WC | A Tomljanović | 1 | 2 | | | | | | | Q | S Sanders | 2 | 4 | | | | | | |
| | A Blinkova | 6$^5$ | 6 | 2 | | | | | | 2 | B Bencic | 6 | 6 | | | | | | |
| LL | M Doi | 7$^7$ | 3 | 6 | LL | M Doi | 1 | 3 | | | | | | | | | | | |
| | | | | | 2 | B Bencic | 6 | 6 | | | | | | | | | | | |

## Qualifying
### Seeds

* Coco Gauff (qualified)
* Bernarda Pera (first round)
* Christina McHale (qualifying competition, lucky loser)
* Madison Brengle (qualified)
* Misaki Doi (qualifying competition, lucky loser)
* Jasmine Paolini (qualified)
* Wang Yafan (first round)
* Kaja Juvan (qualifying competition)
* Caty McNally (qualifying competition)
* Liudmila Samsonova (qualified)
* Astra Sharma (qualifying competition)
* Maddison Inglis (qualified)

### Qualifiers

* Coco Gauff
* Storm Sanders
* Maddison Inglis
* Madison Brengle
* Liudmila Samsonova
* Jasmine Paolini

### Lucky losers

* Misaki Doi
* Christina McHale

### Qualifying draw
#### First qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 1 | Coco Gauff | 6 | 6 | | | | | |
| | Francesca Jones | 1 | 4 | | | | | |
| | Francesca Jones | 1 | 4 | 1 | Coco Gauff | 3 | 7 | 6 |
| | | | | 8 | Kaja Juvan | 6 | 5 | 3 |
| | Lizette Cabrera | 4 | 3 | 8 | Kaja Juvan | 6 | 5 | 3 |
| 8 | Kaja Juvan | 6 | 6 | | | | | |

#### Second qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 2 | Bernarda Pera | 2 | 6 | 3 | | | | |
| WC | Storm Sanders | 6 | 4 | 6 | | | | |
| WC | Storm Sanders | 6 | 4 | 6 | WC | Storm Sanders | 6 | 6 |
| | | | | | 9 | Caty McNally | 2 | 3 |
| | Ankita Raina | 1 | 3 | | 9 | Caty McNally | 2 | 3 |
| 9 | Caty McNally | 6 | 6 | | | | | |

#### Third qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 3 | Christina McHale | 6 | 6 | | | | | |
| WC | Ivana Popovic | 4 | 4 | | | | | |
| WC | Ivana Popovic | 4 | 4 | 3 | Christina McHale | 6 | 2 | 1 |
| | | | | 12 | Maddison Inglis | 4 | 6 | 6 |
| WC | Belinda Woolcock | 4 | 4 | 12 | Maddison Inglis | 4 | 6 | 6 |
| 12 | Maddison Inglis | 6 | 6 | | | | | |

#### Fourth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 4 | Madison Brengle | 6 | 6 | | | | |
| | Destanee Aiava | 2 | 2 | | | | |
| | Destanee Aiava | 2 | 2 | 4 | Madison Brengle | 6 | 6 |
| | | | | | Ellen Perez | 3 | 2 |
| | Ellen Perez | 6 | 6 | | Ellen Perez | 3 | 2 |
| 7 | Wang Yafan | 1 | 4 | | | | |

#### Fifth qualifier

| First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 5 | Misaki Doi | 7 | 6 | | | | |
| | Arina Rodionova | 5 | 1 | | | | |
| | Arina Rodionova | 5 | 1 | 5 | Misaki Doi | 6$^6$ | 3 |
| | | | | 10 | Liudmila Samsonova | 7$^8$ | 6 |
| WC | Kimberly Birrell | 3 | 2 | 10 | Liudmila Samsonova | 7$^8$ | 6 |
| 10 | Liudmila Samsonova | 6 | 6 | | | | |

#### Sixth qualifier

| First round | First round | First round | First round | First round | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition | Qualifying competition |
| 6 | Jasmine Paolini | 4 | 6 | 7$^7$ | | | | | |
| | Asia Muhammad | 6 | 3 | 6$^3$ | | | | | |
| | Asia Muhammad | 6 | 3 | 6$^3$ | 6 | Jasmine Paolini | 3 | 6 | 6 |
| | | | | | 11 | Astra Sharma | 6 | 2 | 1 |
| | Lesia Tsurenko | 4 | 6 | 1 | 11 | Astra Sharma | 6 | 2 | 1 |
| 11 | Astra Sharma | 6 | 4 | 6 | | | | | |