The Royal Australian Air Force's Roulettes aerobatic display team entertain the Melbourne crowds on Australia Day
Nadia Petrova hopes to follow up wins over Kim Clijsters and Svetlana Kuznetsova with a victory against Justine Henin in the women's quarter-finals
Henin takes the first set but is struggling to find anything like her best form as she falls behind in the second
Henin recovers from a break down in the second set to see out a 7-6 (7-3) 7-5 win and secure a return to the semi-finals of a Grand Slam
Russia's Maria Kirilenko finds it hard going early on in her first Grand Slam quarter-final as she faces China's Jie Zheng on Rod Laver Arena
Zheng has already been to the Wimbledon semi-finals and looks in confident mood as she sweeps through the opening set
To make matters worse for Kirilenko, she requires treatment from the trainer early in the second set
Kirilenko cannot stage a comeback and Zheng wins 6-1 6-3 to reach a Grand Slam semi-final for the second time in her career
British junior Laura Robson has a tough time on Court 3 but comes through in three sets against 11th seed Yulia Putintseva to reach the last 16 of the girls' singles
The temperature is rising on Rod Laver Arena as seventh seed Andy Roddick gets started against 14th seed Marin Cilic in the first of the men's quarter-finals
Roddick is in trouble early on as he calls for the trainer to massage his neck and shoulder at several changeovers
The only difficulty for Cilic is a run-in with a line judge as he sweeps into a two-set lead
But, despite his injury problems, Roddick embarks on an unlikely fightback, taking the next two sets to take the match into a decider - and force Andy Murray and Rafael Nadal to wait to take to the court
Roddick has three break-points at the start of the fifth set too but Cilic survives and regains his composure before going on to clinch a 7-6 (7-4) 6-3 3-6 2-6 6-3 win in just under four hours
In a lively match, Cilic is forced to take evasive action to avoid colliding with a line judge
Cilic holds on to reach his first Grand Slam semi-final, and show his exhaustion at the end of another gruelling five-set match
Boxer Ricky Hatton (top left) is in Melbourne to watch Andy Murray's game with Rafael Nadal but seems to be less gripped by the action than some other spectators
Andy Murray is a study in concentration as he battles to take the first set in his quarter-final against defending champion Rafael Nadal
Nadal makes Murray battle all the way before the Scot wins a superb first set in just under an hour
The tension seems to be getting to Nadal as Murray gains the upper hand in their extremely close-fought quarter-final tie
The players swap breaks in the second set which goes to a tie-break - but that is not close at all as Murray races through it 7-1 to open up a two-set lead
Early in the third set Nadal suddenly walks to his chair and calls for a medical time-out because of a problem with his right knee. After a lengthy stoppage he is able to resume
However Nadal is only able to play two more games before retiring injured. He receives words of consolation from Murray whose 6-3 7-6 (7-1) 3-0 win takes him through to his first Australian Open semi-final
The early finish gives Murray the chance to chat with Hatton, who watched the match from the players' box
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