Tennis: day five of the Australian Open

British hopeful Andy Murray faced Frenchman Florent Serra in the third round today
Photograph: Julian Abram Wainwright/EPA

Murray eased to a 3-0 lead in the first set but lacked conviction thereafter and struggled before finally taking the set with a 7-5 victory
Photograph: Jon Buckle/PA

The Scot made light work of the second set, dropping just one game
Photograph: Ryan Pierse/Getty Images

And took the third set 6-4 to book a place against the 6ft 9in American John Isner in the next round
Photograph: Paul Crock/AFP/Getty Images

Laura Robson was back in doubles action with Sally Peers ... and the pair enjoyed a surpising win over 12th seeds Chia-Jung Chuang and Kveta Peschke
Photograph: Jon Buckle/PA

However, Britain's Elena Baltacha produced a disappointing performance against Dinara Safina, losing 6-1, 6-2 to the second seed
Photograph: Jason O'Brien/Action Images

Rafael Nadal was drawn against Philipp Kohlschreiber of Germany
Photograph: William West/AFP/Getty Images

Kohlschreiber fought valiantly, winning the third set, but eventually lost 6-4 6-2 2-6 7-5
Photograph: Joe Castro/EPA

Fur from the tennis balls sticks to the court as Ivo Karlovic of Croatia serves to his compatriot Ivan Ljubicic in their third round match. Karlovic won in four sets
Photograph: Paul Miller/EPA

The biggest shock of the day was the exit of Kim Clijsters, who was beaten emphatically 6-0, 6-1 by Nadia Petrova of Russia
Photograph: Andy Wong/AP