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Sport is in turmoil with cricket rocked by match-fixing allegations, rugby union involved in a betting row, a footballer breaching gambling rules and horseracing's Grand National winner Papillon involved in a massive betting coup.
It has led to calls from national associations for gambling rules to be tightened up as sport tries to improve its tarnished image.
But how do different sports' betting rules differ?
Cricket's world governing body, the International Cricket Council, has arranged an emergency meeting at Lord's, in response to the game's growing match-fixing crisis.
Ex-South African cricket captain Hansie Cronje was recently accused of throwing games, a charge he denies.
He was later sacked and dropped from the side while a police investigation continues.
Ruby Walsh victorious on Papillon
Now former England bowler Chris Lewis claims some of his England team-mates have been offered money by bookmakers to fix matches.
The ICC's Code of Conduct states players and officials should not engage in gambling which would effect the outcome of a cricket match they are involved in, or one which would benefit them.
They should not accept any form of inducement either.
ICC president Jagmohan Dalmiya said: "ICC directors around the world are extremely concerned at the damage to the image of the game by the flow of allegations about players being involved in receiving payments from bookmakers."
In football the rules are much more clear cut.
The Football Association bans players from all betting, except on the licensed pools.
But that did not stop Portsmouth striker Steve Claridge betting £250 on his team to beat Barnsley at odds of 3-1 in January.
He won his bet after Portsmouth beat Barnsley 3-0, with Claridge scoring a hat-trick.
When you see what's happening with South African cricket at the moment it underlines why we have such stringent rules
FA spokesman
He was fined £900 by the FA for breaching its betting rules.
An FA spokesman said: "We've made it abundantly clear in recent years that betting by players, managers and coaches, is against our rules.
"Our rules are clear. People in football cannot bet on matches except for the football pools.
"When you see what's happening with South African cricket at the moment it underlines why we have such stringent rules."
The betting rules in Rugby Union are ambiguous.
Rules state that gambling is banned for those directly involved in a match, but do not explain who would be considered to be directly involved.
Welsh international Neil Boobyer admitted putting a wager on France to beat Wales in the Six Nations Championships.
Claridge: Fined for gambling
Boobyer, who has seven caps, trained with the Wales side before the international although he was not picked for the first team which was beaten 36-3 by France.
He said he was not directly involved in the game and was therefore allowed to bet.
His admission has led Welsh Rugby Union secretary Dennis Gethin and Damian Hopley, secretary of the Profesional Rugby Players Association to call for a ban.
Hopley said: "We are looking for gambling to be banned everywhere. We need parity."
Snooker players are allowed to bet on matches, as long as they are ones which they are not playing in.
The World Professional Snooker and Billiards Association rules state: "No member may bet on a snooker or billiards match in which he is playing or choose someone to place the bet on their behalf."
Massive gamble
In horseracing, jockeys are not allowed to bet on races although trainers and owners are.
This year's Grand National winner Papillon was the subject of a massive gamble, backed down from 33-1 to 10-1.
It emerged that the trainer Ted Walsh approached Ladbroke's on the eve of the big race and placed a hefty bet on Papillon to win.
On receiving the bet and hearing information about the horse's form, Ladbroke dramatically reduced the price of the horse. A number of other bookies did not at first and were stung for thousands of pounds.
What Mr Walsh did was legitimate although The Jockey Club has called on the government, as part of its gambling review, to look at the links between bookmakers and inside information provided by people such as trainers.
The Cronje scandal and other gambling gaffes have led all sports to make sure now more than ever their houses are in good order.
It has led to calls from national associations for gambling rules to be tightened up as sport tries to improve its tarnished image.
But how do different sports' betting rules differ?
Cricket's world governing body, the International Cricket Council, has arranged an emergency meeting at Lord's, in response to the game's growing match-fixing crisis.
Ex-South African cricket captain Hansie Cronje was recently accused of throwing games, a charge he denies.
He was later sacked and dropped from the side while a police investigation continues.
Ruby Walsh victorious on Papillon
Now former England bowler Chris Lewis claims some of his England team-mates have been offered money by bookmakers to fix matches.
The ICC's Code of Conduct states players and officials should not engage in gambling which would effect the outcome of a cricket match they are involved in, or one which would benefit them.
They should not accept any form of inducement either.
ICC president Jagmohan Dalmiya said: "ICC directors around the world are extremely concerned at the damage to the image of the game by the flow of allegations about players being involved in receiving payments from bookmakers."
In football the rules are much more clear cut.
The Football Association bans players from all betting, except on the licensed pools.
But that did not stop Portsmouth striker Steve Claridge betting £250 on his team to beat Barnsley at odds of 3-1 in January.
He won his bet after Portsmouth beat Barnsley 3-0, with Claridge scoring a hat-trick.
When you see what's happening with South African cricket at the moment it underlines why we have such stringent rules
FA spokesman
He was fined £900 by the FA for breaching its betting rules.
An FA spokesman said: "We've made it abundantly clear in recent years that betting by players, managers and coaches, is against our rules.
"Our rules are clear. People in football cannot bet on matches except for the football pools.
"When you see what's happening with South African cricket at the moment it underlines why we have such stringent rules."
The betting rules in Rugby Union are ambiguous.
Rules state that gambling is banned for those directly involved in a match, but do not explain who would be considered to be directly involved.
Welsh international Neil Boobyer admitted putting a wager on France to beat Wales in the Six Nations Championships.
Claridge: Fined for gambling
Boobyer, who has seven caps, trained with the Wales side before the international although he was not picked for the first team which was beaten 36-3 by France.
He said he was not directly involved in the game and was therefore allowed to bet.
His admission has led Welsh Rugby Union secretary Dennis Gethin and Damian Hopley, secretary of the Profesional Rugby Players Association to call for a ban.
Hopley said: "We are looking for gambling to be banned everywhere. We need parity."
Snooker players are allowed to bet on matches, as long as they are ones which they are not playing in.
The World Professional Snooker and Billiards Association rules state: "No member may bet on a snooker or billiards match in which he is playing or choose someone to place the bet on their behalf."
Massive gamble
In horseracing, jockeys are not allowed to bet on races although trainers and owners are.
This year's Grand National winner Papillon was the subject of a massive gamble, backed down from 33-1 to 10-1.
It emerged that the trainer Ted Walsh approached Ladbroke's on the eve of the big race and placed a hefty bet on Papillon to win.
On receiving the bet and hearing information about the horse's form, Ladbroke dramatically reduced the price of the horse. A number of other bookies did not at first and were stung for thousands of pounds.
What Mr Walsh did was legitimate although The Jockey Club has called on the government, as part of its gambling review, to look at the links between bookmakers and inside information provided by people such as trainers.
The Cronje scandal and other gambling gaffes have led all sports to make sure now more than ever their houses are in good order.