| US Open Women | 08/27 16:40 | 23 | [91] Paula Badosa v Kiki Bertens [7] | 4-6,2-6 | |
| WTA Cincinnati | 08/13 17:55 | 25 | [5] Kiki Bertens v Venus Williams [65] | 3-6,6-3,6-7 | |
| WTA Toronto | 08/08 16:35 | 26 | [27] Bianca Andreescu v Kiki Bertens [5] | 6-1,6-7,6-4 | |
| WTA Toronto | 08/06 22:45 | 25 | [152] Francesca Di Lorenzo v Kiki Bertens [5] | 2-6,1-6 | |
| WTA Palermo | 07/28 17:30 | 29 | [5] Kiki Bertens v Jil Teichmann [82] | 6-7,2-6 | |
| WTA Palermo | 07/27 18:30 | 28 | [5] Kiki Bertens v Paula Badosa [119] | 6-1,7-5 | |
| WTA Palermo | 07/26 21:20 | 27 | [5] Kiki Bertens v Jasmine Paolini [142] | 6-4,1-6,6-1 | |
| WTA Palermo | 07/25 18:30 | 26 | [5] Kiki Bertens v Aleksandra Krunic [103] | 6-3,6-1 | |
| WTA Palermo | 07/23 18:30 | 25 | [5] Kiki Bertens v Ekaterine Gorgodze [193] | 6-0,6-1 | |
| Wimbledon Women | 07/06 12:10 | 25 | [4] Kiki Bertens v Barbora Strycova [54] | 5-7,1-6 | |
| Wimbledon Women | 07/04 13:35 | 24 | [4] Kiki Bertens v Taylor Townsend [123] | 3-6,7-6,6-2 | |
| Wimbledon Women | 07/02 17:25 | 23 | [4] Kiki Bertens v Mandy Minella [98] | 6-3,6-2 | |
| WTA Eastbourne | 06/28 11:55 | 28 | [4] Kiki Bertens v Karolina Pliskova [3] | 1-6,2-6 | |
| WTA Eastbourne | 06/27 13:25 | 27 | [10] Aryna Sabalenka v Kiki Bertens [4] | 4-6,6-3,4-6 | |
| WTA Eastbourne | 06/26 15:00 | 26 | [356] Anna-Lena Friedsam v Kiki Bertens [4] | 3-6,3-6 | |
| WTA Eastbourne | 06/25 10:00 | 25 | [39] Yulia Putintseva v Kiki Bertens [4] | 4-6,1-6 | |
| WTA Hertogenbosch | 06/16 10:00 | 29 | [4] Kiki Bertens v Alison Riske [61] | 6-0,6-7,5-7 | |
| WTA Hertogenbosch | 06/15 11:50 | 28 | [4] Kiki Bertens v Elena Rybakina [134] | 6-4,6-4 | |
| WTA Hertogenbosch | 06/14 15:30 | 27 | [4] Kiki Bertens v Natalia Vikhlyantseva [119] | 6-3,6-3 | |
| WTA Hertogenbosch | 06/14 12:25 | 26 | [4] Kiki Bertens v Arantxa Rus [132] | 7-5,6-3 | |
| WTA Hertogenbosch | 06/11 12:50 | 25 | [4] Kiki Bertens v Johanna Larsson [148] | 6-3,6-1 | |
| French Open Women | 05/29 16:00 | 24 | [46] Viktoria Kuzmova v Kiki Bertens [4] | Retired | |
| French Open Women | 05/27 09:00 | 23 | [66] Pauline Parmentier v Kiki Bertens [4] | 3-6,4-6 | |
| WTA Rome | 05/18 10:00 | 28 | [4] Kiki Bertens v Johanna Konta [42] | 7-5,5-7,2-6 | |
| WTA Rome | 05/17 10:00 | 27 | Naomi Osaka v Kiki Bertens | Walkover | |
| WTA Rome | 05/16 14:25 | 26 | [31] Carla Suarez Navarro v Kiki Bertens [4] | 4-6,6-1,3-6 | |
| WTA Rome | 05/16 08:00 | 25 | [54] Amanda Anisimova v Kiki Bertens [4] | 2-6,6-4,5-7 | |
| WTA Madrid | 05/11 16:40 | 29 | [3] Simona Halep v Kiki Bertens [7] | 4-6,4-6 | |
| WTA Madrid | 05/10 18:00 | 28 | [8] Sloane Stephens v Kiki Bertens [7] | 2-6,5-7 | |
| WTA Madrid | 05/09 19:50 | 27 | [7] Kiki Bertens v Petra Kvitova [2] | 6-2,6-3 |
Wikipedia - Kiki Bertens
Kiki Bertens (Dutch pronunciation: [ˈkiki ˈbɛrtəns]; born 10 December 1991) is a Dutch former professional tennis player. Her career-high WTA singles ranking was world No. 4, which she reached on 13 May 2019, becoming the highest-ranked Dutch female player ever. Her career-high doubles ranking of world No. 16, she achieved in April 2018. She won ten singles and ten doubles titles on the WTA Tour including 2018 Cincinnati Open and 2019 Madrid Open. Bertens was widely regarded as a clay court specialist, but also was successful on hardcourt.