MMA is quickly becoming one of the most watched sports around the globe.
In fact, according to studies, MMA is the third most popular sport in the world behind football and basketball, with a total of 451 million people interested in the fight game.
Many of us follow their lives on a regular basis but how many UFC fighters, past and present, can you identfy from a classic childhood photograph?
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Give this SPORTbible quiz a whirl and see if you can get 15/15. Good luck!
Don't forget to tag a mate in the comments to see if they can beat your score!