Dereck Chisora and David Haye may face life bans for their Munich brawl says the British Boxing Board of Control General Secretary, Robert Smith.

"It's a possibility," Smith told BBC Radio 5 live. "The board have many powers. They can fine, they can suspend and they can withdraw a licence."

Haye and Chisora clashed after Chisora's defeat by defending WBC heavyweight champion Vitali Klitschko.

Tottenham Hotspur manager Harry Redknapp was cleared by a London court on Wednesday of tax evasion after a long investigation into allegations of financial corruption in British soccer.

Redknapp, tipped to be the next England manager, was charged with cheating the public revenue in relation to payments totalling $295,000 made to his bank account in Monaco during his time as Portsmouth manager.

The Court of Arbitration for Sport (Cas) has banned Alberto Contador for two years for doping.

He has been stripped of his 2010 Tour de France victory and, with his suspension running until 5 August this year, will miss the 2012 Tour.

The Spaniard, 29, was found guilty of doping after testing positive for clenbuterol during the 2010 Tour.

Victoria Azarenka routed Maria Sharapova 6-3, 6-0 to win the Australian Open women's title on Saturday night and secure the No. 1 ranking, all in her first Grand Slam final.

he 22-year-old Belarusian dropped her opening service game and was down 2-0 after a nervous start before winning 12 of the next 13 games to take the match away from Sharapova, a three-time major winner and the 2008 Australian champion.

She became only the third woman to earn the No. 1 spot after winning her first Grand Slam title.

Azarenka has been a distinctive presence at Melbourne Park as much as for her shrieks and hoots with each shot and seemingly boundless energy as for her white shorts, blue singlet and lime green head and wrist bands.

Against Sharapova, she maintained the frenetic movement that has been the hallmark of her campaign in Australia, her 25th consecutive major. She won the Sydney International title the weekend before the season's first major and is now on a 12-match winning streak.

The third-seeded Azarenka set up championship point with a stunning forehand winner and sealed it when Sharapova netted a groundstroke.

She dropped onto her knees at the baseline with her hands over her face. She got up, held up her hands and mouthed "What happened?" before jogging up to her coach in the stands to celebrate.

Roger Federer can avenge one of his most painful defeats in the Australian Open semi-finals on Thursday in a rematch with Rafael Nadal, which has extra spice after a rare slight from his great rival.

The last time they met in Melbourne, Federer was left a weeping wreck when Nadal remorselessly ground him down in 2009's nail-biting five-set final to claim his first hardcourt grand slam title.

World number two Rafa Nadal took a little bit of time to get into his work but advanced to the second round of the Australian Open on Monday with a 6-4 6-1 6-1 victory over Alex Kuznetsov.

The 10-times grand slam winner, who is battling a niggling shoulder injury and has said his knees were still a concern, took 44 minutes to take the first set against the persistent American.

Defending champion Kim Clijsters showed no ill effects of a recent hip injury and saw off a spirited challenge from Portuguese qualifier Maria Joao Koehler in the first round of the Australian Open on Monday.

The Belgian struggled to get to grips with lefthander Koehler's serve in the first set but gradually moved up through the gears to run out a 7-5 6-1 winner.

Australian Open womens' first round singles draw after qualifying finished on Saturday (* indicates qualifier; prefix denotes seeding):
1-Caroline Wozniacki (Denmark) v Anastasia Rodionova (Australia) Ashleigh Barty (Australia) v Anna Tatishvili (Georgia)