In pics: Australian Open, Day 11

Russia's Maria Sharapova celebrates her semifinal win over Petra Kvitova. (Getty Images)

Victoria Azarenka in a state of disbelief after dispatching defending champion Kim Clijsters in the semifinal. (Getty Images)

Federer's twin daughters, Myla and Charlene, in attendance. (Getty Images)

Nadal plays a backhand during his match against Federer. (Getty Images)

Federer and Nadal at a photocall prior to their semifinal match. (Getty Images)

Kvitova fashions a backhand against Sharapova. (Getty Images)

Clijsters plays a backhand against Azarenka. (Getty Images)

Radek Stepanek of the Czech Republic and Leander Paes of India in action during their semifinal doubles match against Max Mirnyi of Belarus and Daniel Nestor of Canada. (Getty Images)

Roger Federer despairs following his defeat against Rafael Nadal in the semifinals of the Australian Open. (Getty Images)

Rafael Nadal's joy knows no bounds after making the final of the Australian Open. (AP)