Cash, who won the men's title in 1987, has written off the British number one's chances in dramatic fashion.

"If Tim Henman wins Wimbledon I'm going to do this show in one of Sue Barker's old dresses. I'm serious - I'll do the show if I'm invited," Cash declared.

Cash was speaking on BBC's Today at Wimbledon programme after Henman struggled to beat unseeded Michel Kratochvil in five sets.

And the BBC pundit believes the huge pressure on Henman is proving too much of a burden.

"He was pretty average today. He just can't loosen up, he plays so much better the rest of the year," Cash added

The Australian believes British number two Greg Rusedski has a better chance of ending Britain's long wait for a men's winner.

Cash had a spell as Rusedski's coach before the pair were involved in a bitter split over money, but the 37-year-old remains a big fan of his game.

Not convinced

"I think Greg's got a chance, I just don't think Tim does anymore," he said.

"It's all looking good for Greg. If he can get through this match he's got Krajicek and Philippoussis - they won't have a day off and they're both injury prone.

"If Tim and Greg get through to the final then I think Greg will win.

"If Lleyton (Hewitt) gets through I think Greg's got an outside chance because he's got the big game and he can get all over the net. I'm just not convinced by Tim.

"Apart from that I like the idea of cross-dressing."