Jo-Wilfried Tsonga of France reacts after losing a point during his fourth round match against Roger Federer of Switzerland at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014. (AP Photo/Aaron Favila)
Roger Federer of Switzerland celebrates after defeating Jo-Wilfried Tsonga of France during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Aaron Favila)
Roger Federer of Switzerland celebrates after defeating Jo-Wilfried Tsonga of France during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Aaron Favila)