Britain Wimbledon Tennis 2011

Switzerland's Roger Federer waves to the crowd after winning his second round match against France's Adrian Mannarino at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Anja Niedringhaus)

Switzerland's Roger Federer waves to the crowd after winning his second round match against France's Adrian Mannarino at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Anja Niedringhaus)

Switzerland's Roger Federer waves to the crowd after winning his second round match against France's Adrian Mannarino at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Anja Niedringhaus)

Switzerland's Roger Federer waves to the crowd after winning his second round match against France's Adrian Mannarino at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Anja Niedringhaus)

France's Adrian Mannarino prepares to serve during the match against Switzerland's Roger Federer at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Anja Niedringhaus)

France's Jo Wilfried Tsonga, right, consoles Bulgaria's Grigor Dimitrov after defeating him in their match at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Kirsty Wigglesworth)

Ryan Harrison of the US returns to Spain's David Ferrer at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011.(AP Photo/Sang Tan)

Spain's David Ferrer returns a shot to Ryan Harrison of the US during their match at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Sang Tan)

France's Jo Wilfried Tsonga reacts after defeating Bulgaria's Grigor Dimitrov at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Kirsty Wigglesworth)

Germany's Sabine Lisicki in action during the match against China's Li Na at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Anja Niedringhaus)

Germany's Sabine Lisicki reacts during the match against China's Li Na at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Anja Niedringhaus)

Spain's Nicolas Almagro reacts during the match against John Isner of the US at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Sang Tan)

Spain's Nicolas Almagro holds up a tennis ball during the match against John Isner of the US at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011.(AP Photo/Sang Tan)

China's Li Na reacts returns a shot to Germany's Sabine Lisicki at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Anja Niedringhaus)

Marcos Baghdatis of Cyprus, right, shakes hands after defeating Italy's Andreas Seppi at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Alastair Grant)

Marcos Baghdatis of Cyprus kisses the court after defeating Italy's Andreas Seppi at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Alastair Grant)

Bulgaria's Grigor Dimitrov returns a shot to France's Jo Wilfried Tsonga during their match at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Kirsty Wigglesworth)

Bulgaria's Grigor Dimitrov falls to the ground during the match against France's Jo Wilfried Tsonga at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Kirsty Wigglesworth)

Serena Williams of the US returns a shot to Romania's Simona Halep in their match at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Alastair Grant)

Serena Williams of the US returns a shot to Romania's Simona Halep during their match at the All England Lawn Tennis Championships at Wimbledon, Thursday, June 23, 2011. (AP Photo/Alastair Grant)

Venus Williams of the US prepares to serve during the match against Japan's Kimiko Date Krumm at the All England Lawn Tennis Championships at Wimbledon, Wednesday, June 22, 2011. (AP Photo/Kirsty Wigglesworth)

Venus Williams of the US serves to Japan's Kimiko Date Krumm during their match at the All England Lawn Tennis Championships at Wimbledon, Wednesday, June 22, 2011. (AP Photo/Kirsty Wigglesworth)