| WTA Charleston | 04/04 16:20 | 25 | [27] Kiki Bertens v Aleksandra Krunic [50] | 6-4,6-2 | |
| WTA Charleston | 04/02 15:30 | 24 | [27] Kiki Bertens v Veronica Cepede Royg [81] | 6-4,6-1 | |
| WTA Miami | 03/25 16:25 | 25 | [8] Venus Williams v Kiki Bertens [29] | 5-7,6-3,7-5 | |
| WTA Miami | 03/23 19:45 | 24 | [69] Varvara Lepchenko v Kiki Bertens [29] | 7-5,6-7,1-6 | |
| WTA Indian Wells | 03/10 22:55 | 24 | Serena Williams v Kiki Bertens | 7-6,7-5 | |
| WTA Dubai | 02/20 10:00 | 25 | Qiang Wang v Kiki Bertens | 6-3,6-0 | |
| WTA St. Petersburg | 01/30 13:25 | 25 | Vera Zvonareva v Kiki Bertens | Retired | |
| Australian Open Women | 01/19 11:40 | 25 | Kiki Bertens v Caroline Wozniacki | 4-6,3-6 | |
| Australian Open Women | 01/17 06:20 | 24 | Kiki Bertens v Nicole Gibbs | 7-6,6-0 | |
| Australian Open Women | 01/15 01:30 | 23 | Kiki Bertens v Catherine Bellis | 6-7,6-4,6-2 | |
| WTA Sydney | 01/10 04:25 | 26 | Garbine Muguruza v Kiki Bertens | 6-3,7-6 | |
| WTA Sydney | 01/08 09:15 | 25 | Kristie Ahn v Kiki Bertens | 2-6,4-6 | |
| WTA Brisbane | 12/31 07:25 | 25 | Kiki Bertens v Ana Konjuh | 1-6,2-6 | |
| WTA Luxembourg | 10/19 12:45 | 27 | [73] Carina Witthoeft v Kiki Bertens [30] | 6-1,6-2 | |
| WTA Luxembourg | 10/18 13:40 | 26 | [94] Andrea Petkovic v Kiki Bertens [30] | Retired | |
| WTA Luxembourg | 10/17 08:00 | 25 | [110] Denisa Allertova v Kiki Bertens [30] | 4-6,5-7 | |
| WTA Linz | 10/10 18:15 | 25 | [30] Kiki Bertens v Varvara Lepchenko [60] | 3-6,6-7 | |
| WTA Beijing | 10/01 08:40 | 24 | [107] Andrea Petkovic v Kiki Bertens [30] | 6-4,6-0 | |
| WTA Wuhan | 09/26 07:55 | 25 | [30] Kiki Bertens v Varvara Lepchenko [76] | 4-6,4-6 | |
| WTA Wuhan | 09/25 12:30 | 24 | [30] Kiki Bertens v Monica Niculescu [65] | 6-2,6-1 | |
| WTA Seoul | 09/19 05:30 | 25 | [119] Richel Hogenkamp v Kiki Bertens [29] | 5-7,6-4,6-3 | |
| US Open Women | 08/28 16:35 | 23 | [27] Kiki Bertens v Maria Sakkari [95] | 3-6,4-6 | |
| WTA New Haven | 08/21 22:35 | 25 | [25] Kiki Bertens v Elise Mertens [46] | 6-4,4-6,2-6 | |
| WTA Cincinnati | 08/15 20:50 | 25 | [7] Johanna Konta v Kiki Bertens [27] | 6-3,6-3 | |
| WTA Cincinnati | 08/14 18:50 | 24 | [49] Oceane Dodin v Kiki Bertens [27] | 3-6,0-6 | |
| WTA Bastad | 07/27 13:25 | 26 | Kiki Bertens v Barbora Krejcikova | Walkover | |
| WTA Bastad | 07/25 13:00 | 25 | [26] Kiki Bertens v Carina Witthoeft [62] | 6-1,6-4 | |
| WTA Gstaad | 07/23 09:30 | 29 | [32] Anett Kontaveit v Kiki Bertens [35] | 4-6,6-3,1-6 | |
| WTA Gstaad | 07/22 09:00 | 28 | [97] Sara Sorribes Tormo v Kiki Bertens [35] | Retired | |
| WTA Gstaad | 07/21 10:50 | 27 | [48] Johanna Larsson v Kiki Bertens [35] | 4-6,4-6 |
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.