Radwanska sneaks into Cincy QFs

Top seed Agnieszka Radwanska was a hard- fought third-round winner Thursday at the WTA's $2.168 million Western & Southern Open.

The Polish world No. 3 star, who was last month's Wimbledon runner-up to Serena Williams, outlasted American wild card Sloane Stephens 6-1, 4-6, 6-4 on the hardcourts at the Lindner Family Tennis Center.

Also on Day 4, fourth-seeded Czech Petra Kvitova whipped Chinese Peng Shuai 6-2, 6-2 and fifth seed Angelique Kerber of Germany topped Czech qualifier Andrea Hlavackova 6-4, 7-6 (7-5). The 2011 Wimbledon champion Kvitova is fresh off her Monday title in Montreal.