Olympics Day 7 – Tennis

Roger Federer is working overtime at the All England Club. (Clive Brunskill/Getty Images)

Roger Federer is working overtime at the All England Club. (Clive Brunskill/Getty Images)

LONDON, ENGLAND – AUGUST 03: Roger Federer of Switzerland returns a shot against Juan Martin Del Potro of Argentina in the Semifinal of Men’s Singles Tennis on Day 7 of the London 2012 Olympic Games at Wimbledon on August 3, 2012 in London, England. (Photo by Clive Brunskill/Getty Images)