The world No.10 will be guided on the tour by a female mentor from next year.
Kiki Bertens has left the Red Group wide open after beating Ash Barty for the first time in her career at the WTA Finals.
The higher ranked players have made a solid start at the penultimate tournament of the 2019 WTA season.
Kiki Bertens dug in and battled back from match point down to beat Taylor Townsend in three sets at Wimbledon.
Karolina Pliskova thrashed Kiki Bertens in Eastbourne to gain revenge for the Dutchwoman's defeat of her at Wimbledon last year.
Kiki Bertens will play Karolina Pliskova in the semi-finals at Eastbourne after she beat Aryna Sabalenka for the fourth time in a row.
Elina Svitolina suffered her fifth loss in seven matches since her return to the WTA tour following a knee injury when she lost to Alize Cornet.
Kiki Bertens is prioritising health and happiness as she aims for grass court success in the next month.
Ubitennis' guide to the five women who could exit the French Open as world No.1.
The Dutch player has ended Halep's hopes of reclaiming the no.1 spot.
Kiki Bertens beat Sloane Stephens in straight sets at the Madrid Open to book her place in her third WTA Premier 5 final.
The world No.7 evaluates her form and her chances of claiming a maiden grand slam title.
Naomi Osaka maintained her grip on the World No.1 ranking with a serene straight-sets victory over Su-Wei Hsieh in Stuttgart.
2018 Champion Kiki Bertens crashed out of the Volvo Car Open in the third round with a straight-sets loss to Maria Sakkari.
Karolina Pliskova was affected by an exhausting Fed Cup weekend as she withdrew from this week's action in Doha.
Both women overcame some stern resistance from their opponents to win their first title of 2019.
Pavlyuchenkova earned a big win over 9th seed Bertens, while Sasnovich also stunned 20th seed Kontaveit.
The Dutch player has reached the semi-finals of the tournament despite being the lowest ranked player in the draw.
Sloane Stephens produced a stirring fightback in the final set to gain a vital win over Kiki Bertens that edges her closer to the last four.
Kiki Bertens sealed an 11th top ten win today as she beat Angelique Kerber on her WTA Finals debut.