| WTA Gstaad | 07/20 11:40 | 26 | [250] Anna Zaja v Kiki Bertens [35] | 4-6,2-6 | |
| WTA Gstaad | 07/17 12:50 | 25 | [93] Aleksandra Krunic v Kiki Bertens [35] | 3-6,1-6 | |
| Wimbledon Women | 07/04 10:30 | 23 | [24] Kiki Bertens v Sorana Cirstea [63] | 6-7,5-7 | |
| WTA Mallorca | 06/20 14:00 | 25 | [144] Sabine Lisicki v Kiki Bertens [25] | Retired | |
| WTA Den Bosch | 06/13 13:25 | 25 | [27] Kiki Bertens v Andrea Petkovic [84] | 6-7,6-2,2-6 | |
| French Open Women | 05/31 11:55 | 24 | [48] Catherine Bellis v Kiki Bertens [18] | 6-3,7-6 | |
| French Open Women | 05/29 10:55 | 23 | [311] Ajla Tomljanovic v Kiki Bertens [18] | 6-4,1-6,1-6 | |
| WTA Nurnberg | 05/27 11:30 | 29 | [19] Kiki Bertens v Barbora Krejcikova [254] | 6-2,6-1 | |
| WTA Nurnberg | 05/26 11:30 | 28 | [19] Kiki Bertens v Misaki Doi [64] | Retired | |
| WTA Nurnberg | 05/25 14:15 | 27 | [19] Kiki Bertens v Alison Riske [36] | 6-4,6-3 | |
| WTA Nurnberg | 05/24 14:00 | 26 | [19] Kiki Bertens v Annika Beck [70] | 7-5,6-2 | |
| WTA Nurnberg | 05/23 10:05 | 25 | [19] Kiki Bertens v Katharina Gerlach [414] | 6-2,6-1 | |
| WTA Rome | 05/20 10:30 | 28 | [4] Simona Halep v Kiki Bertens [20] | 7-5,6-1 | |
| WTA Rome | 05/19 13:00 | 27 | [20] Kiki Bertens v Daria Gavrilova [33] | 6-3,6-3 | |
| WTA Rome | 05/18 12:35 | 26 | [43] Ekaterina Makarova v Kiki Bertens [20] | 6-7,1-6 | |
| WTA Rome | 05/17 09:00 | 25 | [53] Catherine Bellis v Kiki Bertens [20] | 4-6,0-6 | |
| WTA Rome | 05/16 10:50 | 24 | [48] Monica Niculescu v Kiki Bertens [20] | 6-2,2-6,1-6 | |
| WTA Madrid | 05/11 12:00 | 27 | [19] Kiki Bertens v Anastasija Sevastova [22] | 3-6,3-6 | |
| WTA Madrid | 05/10 13:10 | 26 | [19] Kiki Bertens v Irina-Camelia Begu [36] | 6-1,7-5 | |
| WTA Madrid | 05/09 17:55 | 25 | [28] Timea Bacsinszky v Kiki Bertens [19] | 2-6,2-6 | |
| WTA Madrid | 05/06 14:25 | 24 | [21] Kiki Bertens v Ekaterina Makarova [41] | 6-1,7-6 | |
| WTA Stuttgart | 04/25 13:45 | 25 | [9] Svetlana Kuznetsova v Kiki Bertens [20] | 6-3,5-7,6-3 | |
| 2017 Fed Cup | 04/23 10:55 | - | [99] Jana Cepelova v Kiki Bertens [20] | 3-6,3-6 | |
| 2017 Fed Cup | 04/22 12:50 | - | [126] Rebecca Sramkova v Kiki Bertens [20] | 1-6,3-6 | |
| WTA Bogota | 04/13 21:05 | 27 | [20] Kiki Bertens v Francesca Schiavone [168] | 1-6,4-6 | |
| WTA Bogota | 04/13 15:00 | 26 | [20] Kiki Bertens v Cindy Burger [171] | 6-2,7-5 | |
| WTA Bogota | 04/11 17:00 | 25 | [20] Kiki Bertens v Nina Stojanovic [126] | 6-4,6-1 | |
| WTA Charleston | 04/06 18:15 | 26 | [23] Mirjana Lucic-Baroni v Kiki Bertens [21] | 7-6,6-4 | |
| WTA Charleston | 04/05 15:45 | 25 | [92] Kateryna Bondarenko v Kiki Bertens [21] | 2-6,5-7 | |
| WTA Miami | 03/25 03:45 | 24 | [87] Risa Ozaki v Kiki Bertens [21] | 6-4,4-6,6-1 |
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.