Australian Open 2013 day nine - in pictures

First up at the Rod Laver Arena on day nine are Li Na and Agnieszka Radwanska, who are battling it out in the first of the women's quarter-finals Photograph: Aaron Favila/AP

The first set is an evenly matched affair, with both players breaking service. The fourth seed Radwanska, on a 13-match winning streak, is broken for a second time to lose the set 5-7 Photograph: Cameron Spencer/Pool//EPA

Perhaps hat settles Li – who had already hit 27 unforced errors to Radwanska’s nine by the eighth game of the first set – as she plays a more consistent second set, breaking twice more to take a 5-2 lead Photograph: Cameron Spencer/Getty Images

She holds her nerve and serves out the set to win 7-5, 6-3 in an hour and 42 minutes and reach the semi-final for the third time in four years at Melbourne Photograph: Ryan Pierse/Getty Images

Next up on court is the first of the men's quarter-finals – Nicolas Almargo against David Ferrer. The No10 seed Almagro has the better of the early exchanges and races into a two-set lead: 6-4, 6-4 Photograph: Mark Dadswell/EPA

Ferrer claws his way back into the match by taking the third set 7-5 Photograph: Damir Sagolj/Reuters

Almargo has lost all 12 previous meetings with his Spanish compatriot and the mental baggage is apparent when he fails to serve out the match three times – once in the third set and then twice in the fourth Photograph: David Gray/Reuters

The dogged Ferrer seizes upon the let-offs and takes the last two sets to complete a gutsy 4-6, 4-6, 7-5, 7-6, 6-2 victory Photograph: Greg Wood/AFP/Getty Images

Maria Sharapova takes on compatriot Ekaterina Makarova in the second women's quarter-final, winning the first set 6-2 Photograph: Ryan Pierse/Pool/EPA

Makarova attempts a fightback but racks up twice as many errors as winners Photograph: Mark DadswelL/EPA

Sharapova's dominance is such that Makarova must feel like she is playing three Sharapovas; she loses the second set and the match 6-2, 6-2 Photograph: Narendra Shrestha/EPA

The final match on the Rod Laver Arena is the men's quarter-final between Novak Djokovic and Tomas Berdych. The defending champion is dominant in the first set, taking it 6-1 in just 28 minutes Photograph: Peter Parks/AFP/Getty Images

Berdych, left, regroups and breaks early in the second, and at 5-4 he has the chance to serve out the set. Djokovic applies the pressure with four break points, but Berdych stands firm with a backhand winner down the line Photograph: Manan Vatsyayana/AFP/Getty Images

That proves to be just a blip as the defending champion takes the third set 6-1 Photograph: Manan Vatsyayana/AFP/Getty Images

The top seed dispatches Berdych with little difficulty in the fourth to take the match 6-1, 4-6, 6-1, 6-4. The victory put him into his 11th successive grand slam semi-final Photograph: Andrew Brownbill/AP