Agnieszka Radwanska had another tough day at the office against the young American wildcard, Sloane Stevens, dropping the second set and really having to fight for every point in the third. Experience won out in the end, with Radwanska earning the W with a 6-1 4-6 6-4 final score. She will meet the winner of the match between Na Li and Johanna Larsson which was postponed to Friday because of rain.
Another seeded player who had to dig deep was Angelique Kerber, who battled for almost an hour and a half to overcome a stiff challenge from qualifier Andrea Hlavackova, coming back from 1-4 down in the second set, to finally win 6-4 7-6 (7-5). She will meet Serena in the quarters.
Fourth seeded Petra Kvitova had a much easier time on court, in seeing off Shuai Peng in straight sets, 6-2 6-2. She will next take on the winner of the rain postponed match between Caroline Wozniacki and Anastasia Pavlyuchenkova, with Pavlyuchenkova leading 6-4.