Faf du Plessis' appeal against his charge for ball tampering has been dismissed by the ICC.
The South Africa captain was found guilty after allegedly applying saliva from a sweet or mint to the ball during the Proteas' second Test against Australia at Hobart last month.
Du Plessis was subsequently fined 100 per cent of his match fee, although he was not suspended from playing in the third Test at Adelaide, in which he scored a defiant century among a hostile atmosphere.
The 32-year-old appealed his punishment, but on Wednesday the ICC announced its original decision has been upheld.
"It is the duty of the ICC to ensure fair play on the cricket field. Although it was not picked up by the umpires at the time, when the incident came to our attention subsequently, we felt it was our responsibility to lay a charge in this case because the ICC can't let such an obvious breach of this Law pass without taking any action," said ICC chief executive David Richardson.
"We are pleased that both the Match Referee and Mr Beloff QC have agreed with our interpretation of the Laws and hope that this serves as a deterrent to all players not to engage in this sort of unfair practice in the future.
"It goes without saying that we will be reviewing the outcome to determine if any additional guidelines are needed to provide further clarity to the players and umpires around this type of offence. However, we are satisfied that the Law is clear and is implemented consistently."