Switzerland's Roger Federer plays a shot during his men's singles semi-final tennis match against Argentina's Juan Martin del Potro at The All England Tennis Club in Wimbledon during The 2012 London ... more 

Switzerland's Roger Federer plays a shot during his men's singles semi-final tennis match against Argentina's Juan Martin del Potro at The All England Tennis Club in Wimbledon during The 2012 London Olympic Games. Federer fought through the longest three-set singles match in the Open era when he beat del Potro 3-6, 7-6 (7/5), 19-17 to reach the Olympic final less