Australian Open: Day 10 in pictures

Li Na's fans were out in force for her match against Venus Williams, as the Chinese attempted to emulate her compatriat Zheng Jie and make it through to the semi-finals Photograph: Mark Baker/AP Photograph: Mark Baker/guardian.co.uk Venus started strongly and soon Li Na found herself a set and a break down Photograph: Mick Tsikas/Reuters Photograph: Mick Tsikas/guardian.co.uk But Li rallied - in every sense of the word - putting Venus under pressure and taking the second set on a tie-break Photograph: Vivek Prakash/Pool/AP Photograph: Vivek Prakash/guardian.co.uk Much to Venus's disappointment Photograph: Mick Tsikas/Reuters Photograph: Mick Tsikas/guardian.co.uk Li Na proved to be the stronger of the two in an edgy final set that included nine breaks of serve. Her 2-6, 7-6 (7-4), 7-5 victory meant it was the first time China got two players into the semi-finals of a grand slam Photograph: Joe Castro/EPA Photograph: Joe Castro/guardian.co.uk Venus's sister Serena faced an early scare in her quarter-final as her big hitting opponent, the seventh seed Victoria Azarenka, took a 4-0 lead Photograph: Julian Abram Wainwright/EPA Photograph: Julian Abram Wainwright/guardian.co.uk But the defending champion rediscovered her power game, reeling off five straight games as she took the second set on a tie-break Photograph: Torsten Blackwood/AFP/Getty Images Photograph: Torsten Blackwood/guardian.co.uk Azarenka tried to come back in the final set but was blown away by the power of Serena's tennis Photograph: William West/AFP/Getty Images Photograph: William West/guardian.co.uk And the World No1 was relieved to win the match 4-6, 7-6 (7-4), 6-2 and qualify for a semi-final against Li Na. "I have played her a few times and she has beaten me once [in Stuttgart in 2008]," said Serena of her next opponent. "I know her game well and the way I feel, I have nothing to lose." Photograph: Mark Dadswell/Getty Images Photograph: Mark Dadswell/guardian.co.uk Laura Robson continued her good run of form as she eased into the quarter-finals of the girls' singles with a 6-3, 6-3 victory over Cristina Dinu. It was a dominant performance by the British youngster, who won the match in 67 minutes, winning 78% of points on her first serve and only dropping her serve once Photograph: Clive Brunskill/Getty Images Photograph: Clive Brunskill/guardian.co.uk All that stood between world No1 Roger Federer and his 23rd consecutive grand slam semi-final was Nikolay Davydenko, who had beaten Federer in their last two meetings Photograph: Mick Tsikas/Reuters Photograph: Mick Tsikas/guardian.co.uk For the first half an hour it looked like the Russian No6 seed would make it a hat-trick as his awesome serve and inventive ground strokes made short work of Federer. Davydenko took the first set 6-2 and then looked to be galloping away with the second Photograph: Mark Baker/AP Photograph: Mark Baker/guardian.co.uk At 3-1 down Federer suddenly found his range from the service line and began his comeback Photograph: Quinn Rooney/Getty Images Photograph: Quinn Rooney/guardian.co.uk Federer won the next 13 games in a row in one of the greatest comebacks of his career (admittedly, there haven't been many) Photograph: Greg Wood/AFP/Getty Images Photograph: Greg Wood/guardian.co.uk In the middle of the fourth set, the tide seemed to turn again with Davydenko breaking the Federer serve to make it 3-3, before holding his own to take a 4-3 lead Photograph: Vivek Prakash/Pool/EPA Photograph: Vivek Prakash/Pool/guardian.co.uk However Federerer hung in long enough for the break and then served out for the match ... Photograph: David Gray/Reuters Photograph: David Gray/guardian.co.uk ... much to the delight of the Swiss fans in the crowd, who enjoyed their hero's 2-6, 6-3, 6-0, 7-5 victory Photograph: Ryan Pierse/Getty Images Photograph: Ryan Pierse/guardian.co.uk Jo-Wilfried Tsonga of France faced Serbia's Novak Djokovic in the day's other men's quarter-final ... Photograph: Mick Tsikas/Reuters Photograph: Mick Tsikas/guardian.co.uk The pair traded blows early on - Tsonga taking the first set on a tie-break and Djokovic, likewise, the second Photograph: Mark Kolbe/Getty Images Photograph: Mark Kolbe/guardian.co.uk Djokovic, the third seed, claimed the third set 6-1 Photograph: Quinn Rooney/Getty Images Photograph: Quinn Rooney/guardian.co.uk But Tsonga was irrepressible. He came back to win the match in five sets and book his place in the semi-finals against Federer Photograph: David Gray/Reuters Photograph: David Gray/guardian.co.uk