Serena Williams beaten by Vera Zvonareva in the second round at Eastbourne . The American was forced to retire after just two games of her third-round match against a player ranked outside the top 100 for only the third time this year. Venus Williams reaches quarterfinals with straight sets win over Ana Ivanovic . ` Top seed Jo-Wilfried Tsonga beaten by Czech Radek Stepanek .
Serena Williams beaten by Vera Zvonareva in the second round at Eastbourne . The American was forced to retire after just two games of her third-round match against a player ranked outside the top 100 for only the third time this year. Venus Williams reaches quarterfinals with straight sets win over Ana Ivanovic . Top seed Jo-Wilfried Tsonga beaten by Czech Radek Stepanek .