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.
Which moments in sport stand out for you and why? Let us know your memories via our social media channels.
Which moments in sport stand out for you and why? Let us know your memories via our social media channels.
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