Wimbledon Day 9
Switzerland's Roger Federer returns a ball to Croatia's Ivo Karlovic during their quarter Final match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

Switzerland's Roger Federer returns a ball to Croatia's Ivo Karlovic during their quarter Final match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

Germany's Tommy Haas serves against Serbia's Novak Djokovic in a Men's Quarter Final match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

US' Serena Williams and US' Venus Williams wave after winning against Anna-Lena Groenefeld and US' Vania King during their doubles match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

Switzerland's Roger Federer serves a ball to Croatia's Ivo Karlovic during their quarter Final match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

Croatia's Ivo Karlovic wipes his face during play against Switzerland's Roger Federer during their quarter Final match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

US'Andy Roddick, serves to Australia's Lleyton Hewitt, during their men's singles quarterFinal match on Day 9 at the 2009 Wimbledon at the All England Club. (AP Photo)

Australia's Lleyton Hewitt returns to US' Andy Roddick, during their men's singles quarterFinal match on Day 9 at the 2009 Wimbledon at the All England Club. (AP Photo)

Tommy Haas plays against Novak Djokovic in a Men's Quarter Final match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

Britain's Andy Murray returns to Spain's Juan Carlos Ferrero in their quarterFinal match on Day 9 at the 2009 Wimbledon at the All England Club. (AP Photo)

Spain's Juan Carlos Ferrero returns to Britain's Andy Murray during their quarterFinal match on Day 9 at the 2009 Wimbledon at the All England Club. (AP Photo)

Novak Djokovic plays against Tommy Haas in a Men's Quarter Final match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

Croatia's Ivo Karlovic returns a ball to Roger Federer during their quarter Final match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

Australia's Lleyton Hewitt reacts during his men's singles quarter Final against US' Andy Roddick on Day 9 at the 2009 Wimbledon at the All England Club. (AP Photo)

India's Mahesh Bhupathi partners Mark Knowles of Bahamas' in a Men's Doubles Quarter Final match against South Africa's Wesley Moodie and Belgium's Dick Norman on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

A Swiss tennis fan attends a tennis match between Roger Federer and Croatia's Ivo Karlovic during their quarter Final match on Day 9 at the 2009 Wimbledon at the All England Club. (AP Photo)

Japan's Akiko Omae returns a ball to France's Kristina Mladenovic during their girls match on Day 9 at the 2009 Wimbledon at the All England Club. (AFP Photo)

France's Kristina Mladenovic returns a ball to Japan's Akiko Omae during their girls match on Day 9 at the 2009 Wimbledon at the All England Club. (AP Photo)