ALL-rounder Shane Watson says Australian cricketers have been smeared by false match-fixing claims.
The allegations, aired in a London court, were dismissed by a senior International Cricket Council corruption investigator.
The investigator, Alan Peacock, gave evidence to the court a day after the claims were aired in a covert tape recording of sports agent Mazhar Majeed.
Majeed said on the tape, recorded by an undercover journalist, that Australian players would fix "brackets", a set period of a match on which to bet.
"The Australians, they are the biggest. They have 10 brackets a game," Majeed said in recordings played to the court on Monday.
But Peacock told the court on Tuesday: "We have no evidence that the Australians had committed 10 brackets a game - or any brackets."
Majeed's claim surfaced at the trial of ex-Pakistan cricket captain Salman Butt and fast bowler Mohammad Asif.
Both have pleaded not guilty to charges of conspiracy to cheat, and conspiracy to obtain and accept corrupt payments.
Australian vice-captain Watson, on tour in South Africa, said the claims were shocking.
"They've been very disappointing and pretty shocking really to see these allegations that have come out from this court case that is going on at the moment," he told reporters in Cape Town.
" ... It challenges the integrity of the game we all love so much.
"People not just in cricket but outside cricket start to question certain things that happen in games.
"In sport, crazy events sometimes do happen.
"You never want people questioning what exactly is going on so it's very disappointing when these things come out."
Majeed, in the recordings, claimed he managed ex-Australian paceman Nathan Bracken, who rejected knowing the agent.
Watson urged Bracken and other cricketers named in court to act quickly to defend their integrity.
"Absolutely it does (question integrity) and it's unbelievably disappointing," Watson said.
"There's no doubt that if my name came up in that as well, especially when you know exactly how much you give every time you play and you're only there to get the best out of yourself and perform.
"If your integrity gets questioned, there's no doubt you have to do everything you can to make sure you do clear your name because the majority of people who play sport and play cricket, you're only there to get the best out of yourself and performing as well as you can every single game.
"When that's questioned, it's really just a huge question on your character and you've got to try and clear your name as soon as you can."
