| WTA Madrid | 05/08 10:00 | 26 | [7] Kiki Bertens v Anastasija Sevastova [13] | 6-1,6-2 | |
| WTA Madrid | 05/06 10:00 | 25 | [7] Kiki Bertens v Jelena Ostapenko [29] | 6-4,6-3 | |
| WTA Madrid | 05/04 18:40 | 24 | [7] Kiki Bertens v Katerina Siniakova [44] | 6-3,6-2 | |
| WTA Stuttgart | 04/27 13:30 | 28 | [3] Petra Kvitova v Kiki Bertens [7] | 7-6,3-6,6-1 | |
| WTA Stuttgart | 04/26 16:30 | 27 | [7] Kiki Bertens v Angelique Kerber [5] | 6-3,6-4 | |
| WTA Stuttgart | 04/25 13:25 | 26 | [7] Kiki Bertens v Belinda Bencic [20] | 4-6,6-3,6-4 | |
| WTA Stuttgart | 04/23 17:55 | 25 | [7] Kiki Bertens v Anna-Lena Friedsam [352] | 7-5,6-2 | |
| WTA Charleston | 04/04 16:40 | 26 | [50] Maria Sakkari v Kiki Bertens [6] | 7-6,6-3 | |
| WTA Charleston | 04/03 02:00 | 25 | [159] Martina Trevisan v Kiki Bertens [6] | 2-6,1-6 | |
| WTA Miami | 03/25 15:00 | 26 | [11] Ashleigh Barty v Kiki Bertens [8] | 4-6,6-3,6-2 | |
| WTA Miami | 03/23 21:55 | 25 | [48] Viktoria Kuzmova v Kiki Bertens [8] | 6-3,0-6,1-6 | |
| WTA Miami | 03/22 01:25 | 24 | [190] Xiyu Wang v Kiki Bertens [8] | 4-6,1-6 | |
| WTA Indian Wells | 03/12 18:00 | 26 | [7] Kiki Bertens v Garbine Muguruza [20] | 7-5,1-6,4-6 | |
| WTA Indian Wells | 03/10 20:55 | 25 | [7] Kiki Bertens v Johanna Konta [45] | 7-6,6-4 | |
| WTA Indian Wells | 03/09 02:15 | 24 | [7] Kiki Bertens v Magda Linette [92] | 6-4,6-1 | |
| WTA Dubai | 02/19 08:00 | 25 | [8] Kiki Bertens v Viktoria Kuzmova [46] | 2-6,6-4,6-7 | |
| WTA Doha | 02/14 18:55 | 27 | [8] Kiki Bertens v Elise Mertens [21] | 4-6,3-6 | |
| WTA Doha | 02/13 14:05 | 26 | [8] Kiki Bertens v Carla Suarez Navarro [26] | 2-6,6-1,6-1 | |
| WTA Doha | 02/12 16:05 | 25 | [8] Kiki Bertens v Camila Giorgi [28] | 0-6,7-6,6-4 | |
| WTA St. Petersburg | 02/03 13:30 | 29 | [30] Donna Vekic v Kiki Bertens [8] | 6-7,4-6 | |
| WTA St. Petersburg | 02/02 11:00 | 28 | [10] Aryna Sabalenka v Kiki Bertens [8] | 6-7,2-6 | |
| WTA St. Petersburg | 02/01 13:30 | 27 | [32] Anastasia Pavlyuchenkova v Kiki Bertens [8] | 2-6,6-3,0-6 | |
| WTA St. Petersburg | 01/31 15:30 | 26 | [148] Ysaline Bonaventure v Kiki Bertens [8] | 4-6,2-6 | |
| Australian Open Women | 01/16 00:00 | 24 | [44] Anastasia Pavlyuchenkova v Kiki Bertens [9] | 3-6,6-3,6-3 | |
| Australian Open Women | 01/14 04:25 | 23 | [56] Alison Riske v Kiki Bertens [9] | 3-6,3-6 | |
| WTA Sydney | 01/11 03:00 | 28 | [15] Ashleigh Barty v Kiki Bertens [9] | 6-7,6-4,7-5 | |
| WTA Sydney | 01/10 05:45 | 27 | [44] Yulia Putintseva v Kiki Bertens [9] | 2-6,2-6 | |
| WTA Sydney | 01/09 23:00 | 26 | Garbine Muguruza v Kiki Bertens | Walkover | |
| WTA Sydney | 01/07 06:00 | 25 | [69] Bernarda Pera v Kiki Bertens [9] | 5-7,4-6 | |
| WTA Sydney | 01/07 02:30 | - | Johanna Konta v Kiki Bertens | Cancelled |
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.