Olympics Day 7 – Tennis

Roger Federer secured Switzerland's first medal of the London Games by edging Juan Martin del Potro in an instant classic. (Clive Brunskill/Getty Images)

Roger Federer secured Switzerland’s first medal of the London Games by edging Juan Martin del Potro in an instant classic. (Clive Brunskill/Getty Images)

LONDON, ENGLAND – AUGUST 03: Roger Federer of Switzerland reacts reacts after a point 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)