Serena Williams

But in the case of this year's Australian Open, it is not Serena Williams's dicky ankle that has grabbed the nation's attention, but her finely honed six-pack, which was caught on camera when she went out to practise on Rod Laver Arena in a crop top.

It was a revealing moment, in every sense, and you had to wonder whether Williams was sending a signal to her rivals. Could those sharp-edged abdominals mean that she is readying herself for a tilt at the big prizes this year?

Williams likes to act the part of the couch potato. She told reporters that ''I've actually never liked sports and I never understood how I became an athlete. I don't like working out; I don't like anything that has to do with working physically.'' The physical evidence tells a different story. There can be little doubt that Williams, who has declined to appear in any tournaments since the US Open last September, has been putting in the hours.

If she can improve her speed around the court then Williams still has a strong enough game to destroy any of her younger challengers. When she made her comeback last year, Williams had spent a year out of the game and undergone surgery, not just for her wounded foot but for a life-threatening blood clot as well. It was hardly surprising that she was a little slow. Yet even then, she was good enough to reach the final of the US Open, where it took a career-best performance from Sam Stosur to stop her.

Stosur should be a challenger here. There are several other strong contenders: not only Kim Clijsters - who has been drawn in the same quarter as world No.1 Caroline Wozniacki - but Wimbledon champion Petra Kvitova and China's Li Na, last year's runner-up at Melbourne Park.

Telegraph, London
Simon Briggs