 Four weeks after the Wimbledon final , Federer again faced Murray on the Wimbledon centre court , this time for the final of the 2012 Summer Olympics . This came after an epic 4 @-@ hour 26 @-@ minute semifinal against Juan Martin del Potro of Argentina that Federer won 19 – 17 in the third and final set . He lost to Murray in straight sets in the final , winning a silver medal for his country . 
