From your team being hard done by, an athlete using sports to send out political messages or someone has just flat-out cheated, here are just 9 controversial moments that got the world talking.
See how many of these moments you can remember in this gallery.
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5. Ben Johnson cheats his way to gold in 1988 Olympics
Canadian sprinter Ben Johnson won gold in the 1988 Seoul Olympic Games, beating his own world record in the process. However he failed a post-race drug test and , almost as quickly as he had won, Johnson's medal was taken away. Photo: Getty Images
6. Black Rights Movement - 1968 Olympic protest
During their medal ceremony, African-American athletes Tommie Smith and John Carlos each raised a black-gloved fist during the playing of the US national anthem to protest. They then turned to face the US flag and kept their hands raised until the anthem had finished. Photo: Getty
7. Jesse Owens embarrasses the Nazis
The 1936 Berlin Olympics were held in a tense, politically charged atmosphere amidst the rise of the Nazis, who used the games for their own propaganda. But Hitler was left embarrassed by black American Jesse Owens, who won three individual gold medals. Photo: Getty Images
8. Mike Tyson bites Evander Holyfield
The heavyweights met in 1997. The bout had a bad-tempered start after Holyfield caught Tyson with a headbutt. Iron Mike's reaction was to bite a chunk out of his opponent's ear, earning a round 3 loss, a $3 million fine and a disqualification from boxing. Photo: AFP via Getty Images