Munich 
Bucharest 
Oeiras 
San Miguel de Tucuman 
Acapulco 
Gwangju Challenger 
Davis Сup Group I Tennis. Played Bertens Kiki. Season 2021
Country 
Netherlands. Ranking WTA 0.
Netherlands. Ranking WTA 0. WTA - Tokyo Olympics | ||||
|---|---|---|---|---|
| 24.07.2021 | First round | Bertens Kiki — Vondrousova Marketa | 1:2 (4:6, 6:3, 4:6) |
|
 WTA - Wimbledon | ||||
| 29.06.2021 | First round | Bertens Kiki — Kostyuk Marta | 0:2 (3:6, 4:6) |
|
| WTA - Hastings Direct International Championships | ||||
| 22.06.2021 | First round | Rogers Shelby — Bertens Kiki | 2:0 (6:1, 7:5) |
|
 WTA - French Open | ||||
| 31.05.2021 | First round | Bertens Kiki — Hercog Polona | 1:2 (1:6, 6:3, 4:6) |
|
 WTA - Madrid | ||||
| 01.05.2021 | Second round | Kudermetova Veronika — Bertens Kiki | 2:0 (6:4, 6:3) |
|
| 29.04.2021 | First round | Bertens Kiki — Jimenez Kasintseva Victoria | 2:0 (6:4, 6:0) |
|
 WTA - NASDAQ-100 | ||||
| 26.03.2021 | Second round | Samsonova Liudmila — Bertens Kiki | 2:0 (6:2, 6:1) |
|
 WTA - Dubai Duty Free Women's Open | ||||
| 09.03.2021 | Second round | Martincova Tereza — Bertens Kiki | 2:0 (6:1, 6:4) |
|
 WTA - Qatar Total Open | ||||
| 01.03.2021 | First round | Bertens Kiki — Ostapenko Jelena | 0:2 (0:6, 2:6) |
|