Leonardo Mayer advanced to the semifinals of the LA Tennis Open when No. 2 seed Mardy Fish withdrew with an abdominal strain on Friday.

Wimbledon champion Serena Williams has lost to Australia's Samantha Stosur, falling 6-2, 3-6, 6-2, in the quarterfinals of the Bank of the West Classic.

Billie Jean King would love to head to the tennis court at the White House after she receives the Medal of Freedom. But the tennis great hasn't hit balls for nearly a year and needs two knee replacements before she can play again. King is among 16 honorees who will receive the Medal of Freedom from President Barack Obama on Aug.

Billie Jean King would love to head to the tennis court at the White House after she receives the Medal of Freedom. But the tennis great hasn't hit balls for nearly a year and needs two knee replacements before she can play again. King is among 16 honorees who will receive the Medal of Freedom from President Barack Obama on Aug.

Top-seeded Nikolay Davydenko saved five set points in the first set Friday before reaching the semifinals of the Croatia Open with a 7-6 (10), 6-1 win over Simone Bolelli of Italy.

Andreas Beck of Germany reached his first ATP semifinal Friday by defeating Victor Crivoi of Romania 6-4, 7-6 (5) at the Swiss Open.

Fifth-seeded Vera Dushevina reached the semifinals of the Istanbul Cup Friday by routing No. 3-seeded Anabel Medina Garrigues of Spain 6-1, 6-2.

Sam Querrey advanced to the quarterfinals of a tournament for the third straight week by beating Ryan Sweeting 6-3, 6-7 (5), 6-3 in the second round of the L.A. Tennis Open.

Wimbledon champion Serena Williams advanced to the quarterfinals of the Premier Bank of the West Classic, beating Hungary's Melinda Czink 6-3, 7-6 (7).

Top-seeded Nikolay Davydenko eased into the Croatia Open quarterfinals by beating Alberto Martin of Spain 6-2, 6-3.