STANFORD, Calif. (AP) - Germany's Sabine Lisicki knocked off her second straight seeded opponent at the Bank of the West Classic on Friday, beating fifth-seeded Agnieszka Radwanska of Poland 7-6(4), 2-6, 6-2 in the quarterfinals.
Lisicki will meet the winner of the late match between Serena Williams and Maria Sharapova. Lisicki was a semifinalist at Wimbledon and has improved her ranking to 26th after being No. 218 in March.
The 14th-ranked Radwanska was a semifinalist at Stanford last year. She's still looking for her first tour title since 2008.
Third-seeded Marion Bartoli of France advanced when Japan's Ayumi Morita retired after dropping the first set 6-1.
Bartoli will meet eighth-seeded Dominika Cibulkova of Slovakia, who beat qualifier Marina Erakovic 6-1, 6-1.