Sloane Stephens has reached the semi-finals of the WTA Finals after knocking out German high seed Angelique Kerber.
The American has gained all three matches in Singapore this week and beat world quantity two Keber 6-Three 6-Three to arrange a last-four match with Karolina Pliskova.
Japan’s US Open champion Naomi Osaka’s retired from her match in opposition to Kiki Bertens with a thigh harm after the Dutchwoman took the primary set 6-3.
Bertens will face Ukraine’s Elina Svitolina in Saturday’s different semi.
“I knew it was going to be a battle in opposition to one of many hardest gamers on the tour,” stated Stephens, 25, who topped the purple group with the win and recorded her fifth straight win in opposition to the reigning Wimbledon champion.
“So I simply got here out and performed as arduous as I may and am actually happy with the win. The 4 lowest-ranked gamers have progressed to the semi-finals, with Kerber and Osaka eradicated alongside Caroline Wozniacki and Petra Kvitova.
Osaka took a medical timeout at 5-Three down within the opening set and, after Bertens gained the following sport to take the set, the 21-year-old conceded the match.
“I noticed her within the match earlier than that she was struggling slightly bit with the hamstring, and naturally she was taped immediately, however I believe to start with she was nonetheless okay,” stated Bertens.
“It is by no means simple or by no means good to win a match like this, however it’s what it’s. I will take it and I will take my relaxation, and I’ve some extra restoration time for tomorrow.”
Osaka was ranked as little as 72nd on the planet in January, however has loved a sudden rise, culminating in her US Open win in September.
The world quantity 4’s maiden Grand Slam win at Flushing Meadows was overshadowed by Serena Williams’ outbursts on the umpire.
“It is simply been a number of new experiences,” stated Osaka. “I am very grateful that I used to be capable of have the alternatives that I had. I really feel like I’ve matured. I hope I can say that.”