French Open champion Ashleigh Barty and World No.3 Karolina Pliskova are the favourites for the title after Kvitova was forced to withdraw.
The world No.1 reacts to her exit from Roland Garros.
The world No.1 produced an error-stricken performance against the underdog as her 16-match winning streak at grand slam tournaments comes to an end.
Naomi Osaka had to battle hard to overcome a tricky test in Victoria Azarenka to reach the last 32 in Paris.
The two former players share their opinions about the two-time grand slam champion.
Naomi Osaka survived a big scare to advance to the second round of Roland Garros.
Ubitennis' guide to the five women who could exit the French Open as world No.1.
Ubitennis reflects on Roger Federer and Naomi Osaka's withdrawal from Rome on Friday.
The two-time grand slam champion reflected on her current form following her latest win in Madrid.
Naomi Osaka survived a testing three-set encounter with Sara Sorribes Tormo to progress to the third round in Madrid for the first time.
Naomi Osaka has remained optimistic despite withdrawing from her semi-final with Anett Kontaveit today.
Naomi Osaka battled back from a seemingly impossible position in the decider to edge out Donna Vekic and reach the semi-finals in Stuttgart.
It has been a rough ride for the two-time grand slam champion in recent months.
Naomi Osaka maintained her grip on the World No.1 ranking with a serene straight-sets victory over Su-Wei Hsieh in Stuttgart.
A war of words between the two parties have broken out.
The two-time grand slam champion is the latest athlete to team up with the prestigious American sporting goods company.
The loss is the latest setback for Osaka as she fights to maintain her position at the top of the rankings.
Five players and one position - here are the different scenarios Osaka and her rivals are facing in Miami.
Trouble is brewing off the court for the Australian Open champion.
Belinda Bencic came up with some breathtaking tennis to knock out defending champion Naomi Osaka in Indian Wells.