Images from Monday's play at the Australian Open
Roger Federer of Switzerland hits a return to Milos Raonic of Canada during their men's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.DAVID GRAY/Reuters
Milos Raonic of Canada watches the ball during his men's singles match against Roger Federer of Switzerland at the Australian Open tennis tournament in Melbourne January 21, 2013.DAMIR SAGOLJ/Reuters
Roger Federer of Switzerland changes his shirt during a break in his men's singles match against Milos Raonic of Canada at the Australian Open tennis tournament in Melbourne January 21, 2013.TIM WIMBORNE/Reuters
Milos Raonic of Canada hits a return to Roger Federer of Switzerland during their men's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.TIM WIMBORNE/Reuters
Roger Federer of Switzerland serves to Milos Raonic of Canada during their men's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.DAVID GRAY/Reuters
Serena Williams of the U.S. hits a return to Maria Kirilenko of Russia during their women's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.NAVESH CHITRAKAR/Reuters
Serena Williams of the U.S. signs an autograph for a fan after her women's singles match against Maria Kirilenko of Russia at the Australian Open tennis tournament in Melbourne January 21, 2013.DAVID GRAY/Reuters
Sloane Stephens of the U.S. celebrates during her women's singles match against Bojana Jovanovski of Serbia at the Australian Open tennis tournament in Melbourne January 21, 2013.DAMIR SAGOLJ/Reuters
Andy Murray of Britain serves to Gilles Simon of France during their men's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.DAMIR SAGOLJ/Reuters
Andy Murray of Britain signs autographs for fans after defeating Gilles Simon of France in their men's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.DAMIR SAGOLJ/Reuters
Maria Kirilenko of Russia hits a return to Serena Williams of the U.S. during their women's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.DANIEL MUNOZ/Reuters
Jo-Wilfried Tsonga of France serves to compatriot Richard Gasquet during their men's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.DANIEL MUNOZ/Reuters
Gilles Simon of France hits a return to Andy Murray of Britain during their men's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.TIM WIMBORNE/Reuters
Bojana Jovanovski of Serbia serves to Sloane Stephens of the U.S. during their women's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.TIM WIMBORNE/Reuters
Sloane Stephens of the U.S. hits a return to Bojana Jovanovski of Serbia during their women's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.TIM WIMBORNE/Reuters
Bojana Jovanovski of Serbia picks up her towel from a ball kid during her women's singles match against Sloane Stephens of the U.S. at the Australian Open tennis tournament in Melbourne January 21, 2013.TIM WIMBORNE/Reuters
Jo-Wilfried Tsonga of France celebrates defeating compatriot Richard Gasquet in their men's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013.NAVESH CHITRAKAR/Reuters
France's Jo-Wilfried Tsonga hits a return to compatriot Richard Gasquet during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 21, 2013Dita Alangkara/The Associated Press
Russia's Svetlana Kuznetsova falls over during her fourth round match against Denmark's Caroline Wozniacki at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 21, 2013.Andrew Brownbill/The Associated Press
Italy's Andreas Seppi stretches to make a forehand return to France's Jeremy Chardy during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 21, 2013.Andy Wong/The Associated Press