Nie wiem czy dokładnie o to Ci chodziło, ale spróbuję;)
In 1986 England were playing Argentina in the quarter-finals of the World Cup.
In this match an Argentinian football player - Diego Maradona scored a goal.
The English players protested, but the referee gave the goal.
Then the TV cameras showed that Maradona had scored the goal with his hand.
Anyway, thanks to this goal Argentina won this match and they countinued the fight in the World Cup.
In 1904 Fred Lorz won the marathon.
He was waiting for the medal, people were cheering him, he even took a photo with the Presidents daughter.
Suddenly everybody started shouting "cheat".
It turned out that he travelled 18km by car.
Of course he didn't get the medal.
In the 1976 Montreal Olympics Boris Onischenko was competing against Jim Fox.
Boris was winning with perfect "hits", but Jim Fox protested. He said that Boris wasn't hitting him. So the Olympic officials had to examine Boris's sword.
They discovered that he had changed the electronic part of his sword and he could cheat the scoreboard and the spectators.
People lost their respect to him.