Top seed Maria Sharapova struggles in the early stages of her quarter-final against Anna Chakvetadze

Twelfth seed Chakvetadze serves for the first set against her fellow Russian but eventually loses out in a tiebreak

There should be no looking back for Sharapova at that point but she has to work hard for her 7-6 7-5 victory

Jimmy Connors puts Andy Roddick through his paces ahead of Thursday's semi against Roger Federer

Three-time former champion Martina Hingis takes the first set against Kim Clijsters

Clijsters, playing in her last Australian Open before her retirement, struggles with her rhythm throughout the match

Such is her inconsistency, the fourth seed is overcome with relief after finally clinching a 3-6 6-4 6-3 win

The popular Belgian will be back on the Rod Laver Arena to play Maria Sharapova in the semi-final

German Tommy Haas takes the opening set of his quarter-final match against Nikolay Davydenko

But the Russian third seed hits breaks twice in the second set to level the match

Haas saves a match point before securing a 6-3 2-6 1-6 6-1 7-5 win in three hours 19 minutes

Fernando Gonzalez is in fine form as he seals the opening set 6-2 against the number two seed Rafael Nadal

The Spaniard is stunned as Chilean tenth seed Gonzalez takes control - holding his nerve to win the second set 6-4

The world number two fails to recover and crashes out in straight sets as the superb Gonzalez wins 6-2 6-4 6-3