Melbourne: American 16th seed John Isner won a 4-hour 41-minute marathon second-round match, including a 99-minute last set, over former Wimbledon finalist David Nalbandian. Isner had 43 aces in his 4-6, 6-3, 2-6, 7-6 (5), 10-8 win.
Nalbandian had several run-ins with the chair umpire during the often tense match. The Argentinian was enraged when a tournament official refused to overrule the chair umpire's decision to decline a review of a line call late in the fifth. He later smashed his racquet to the ground in disgust when he netted a backhand on match point.
Easy win for Nadal
Earlier in the day, second seed Rafael Nadal maintained his perfect record against Tommy Haas, beating the veteran German 6-4, 6-3, 6-4 in a second round match.
Nadal earned service breaks in the first and last games of the match to beat Haas, the oldest player in the men's singles draw at 33, for the fifth straight time — and without ever dropping a set.
The Spanish left-hander went into his second round match against Haas with concerns over his right knee — a twisted tendon that he injured while sitting down awkwardly at his hotel.
With the knee heavily taped Wednesday, he showed no obvious signs of discomfort to advance to the third round.
Federer gets walkover
Roger Federer advanced to the third round without even taking to the court when his German opponent Andreas Beck gave a walkover.
The Swiss, seeded third, was due to play left-hander Beck on Hisense Arena but the 25-year-old was forced to pull out with a lower back problem.
Federer said his opponent had told him of the problem in the locker room.
"He said, 'I'm not so good actually. I have a bad back'," Federer told reporters. "It came as a surprise. He said he had a lot painkillers and pain during the last match. I think it happened four, five days ago.
"He doesn't want to risk it early in the season, best five sets against me.
"Nothing he could have done, even though he would love to play against me. I guess it's the only smart decision for him to take."
Meanwhile, Czech No. 7 seed Tomas Berdych beat Olivier Rochus of Belgium 6-1, 6-0, 7-6 (4) in the second round.
Fish crashes out
A tempestuous Mardy Fish crashed out in the second round, losing to Colombia's Alejandro Falla 7-6 (4), 6-3, 7-6 (6).
Fish looked uncomfortable and increasingly frustrated as the match wore on, speaking impatiently to a ball kid at one point and complaining to the chair umpire on multiple changeovers about the number of times Falla had called the trainer.
Falla double-faulted on his first match point in the third-set tiebreaker, but came back to win it when Fish badly missed a backhand volley.
Fish, seeded eighth at Melbourne Park, is coming off a career-best season in which he cracked the top 10 for the first time and reached the quarterfinals of Wimbledon.
Top-seeded Caroline Wozniacki stayed on track to keep her No 1 ranking with a 6-1, 7-6 (4) win over Anna Tatishvili of Georgia in the second round.
Wozniacki rallied from 4-1 down in the second set and needed a medical timeout at 4-5 to get treatment for a blister on her left big toe. The Danish player saved one set point in the 10th to force the tiebreaker, which she won when Tatishvili sprayed a forehand wide.
Wozniacki needs to reach the quarterfinals at least to have a chance of staying at No. 1, a ranking she held for all but one week of 2011.
Defending champion Kim Clijsters cruised into the third round and then showed just how much support she has at Rod Laver Arena by getting the crowd to sing 'Happy Birthday' to her younger sister in a live TV broadcast.
Clijsters only needed 47 minutes to beat Stephanie Foretz Gacon of France 6-0, 6-1 on Wednesday, conceding just 10 points in the first set and showing no signs of a left hip complaint that forced her to retire during a semifinal against Daniela Hantuchova at a warmup tournament at the Brisbane International two weeks ago.
She will meet Hantuchova in the next round here, and has a potential rematch of the 2011 Australian Open final with Li Na in the fourth.
Li Na cruises
French Open champion Li Na has become the first women through to the third round at the Australian Open after beating Olivia Rogowska 6-2, 6-2 in just over an hour at Rod Laver Arena on Wednesday.
Li, who became the first Chinese player to win a Grand Slam singles title when she beat Francesca Schiavone in last year's French Open final, will next play the winner of the second-round match between Anabel Medina Garrigues and Olga Govortsova in the third round.
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Updated Date: Jan 18, 2012 15:37:20 IST