Australian Open 2011 - day five in pictures

It's another blistering day in Melbourne ... just ask him Photograph: Nicolas Asfouri/AFP/Getty Images

Denmark's Caroline Wozniacki defeats the Slovakian Dominika Cibulkova 6-4, 6-3 Photograph: Jason O'Brien/Action Images

Maria Sharapova emerges from the shadows to hit back against Julia Goerges of Germany. Sharapova wins 4-6, 6-4, 6-4 Photograph: Rungroj Yongrit/EPA

Gaël Monfils plays a shot between his legs against Stanislas Wawrinka of Switzerland Photograph: Mark Kolbe/Getty Images

It proves a frustrating afternoon for the 12th seed, who is beaten by Wawrinka, the 19th seed, 7-6, 6-2, 6-3 Photograph: David Gray/Reuters

Two officials assess the surface of the court at Hisense Arena after reports that the ball is not bouncing. A quick demonstration illustrates the case Photograph: Julian Finney/Getty Images

Roger Federer finds that the net is a stiffer opponent than Xavier Malisse. Federer wins in three sets, conceding only seven games Photograph: David Gray/Reuters

Andy Roddick makes it safely past Robin Haase of the Netherlands, despite losing the first set Photograph: Julian Finney/Getty Images

Kei Nishikori of Japan serves to Fernando Verdasco of Spain, but with limited joy. Nishikori only holds serve in nine games during a straight sets defeat Photograph: Yuriko Nakao/Reuters

Novak Djokovic is perplexed as Dancing With the Stars dancer Kym Johnson tries to get her leg over Photograph: Robert Prezioso/Getty Images

Hard to know if he's really enjoying this, or if he's in agony Photograph: Dan Peled/EPA

Djokovic plays dead, but still the strange lady doesn't go away Photograph: Shuji Kajiyama/AP

Up he gets, looking sheepish. Classic banter there. The PR execs will be happy Photograph: Shuji Kajiyama/AP