Switzerland's Stanislas Wawrinka rests on the net after losing his fourth round match against Serbia
Serbia's Novak Djokovic, right, embraces Switzerland's Stanislas Wawrinka after winning their fourt
Novak Djokovic of Serbia rips his shirt off as he celebrates winning in five sets in his fourth roun
Serbia's Novak Djokovic rips his shirt off as he celebrates his fourth round win over Switzerland's
Novak Djokovic of Serbia looks to the sky in frustration in his fourth round match against Stanislas
Stanislas Wawrinka of Switzerland plays a backhand in his fourth round match against Novak Djokovic.