She's the current golden girl of the pool; a triple winner at the recent British Championships and a hot tip for yet more medal success when the World Championships take place in Kazan, Russia later this summer.
But it's not just gold medals on Jazz Carlin's mind. The Welsh swimmer is a massive Manchester United fan and when not breaking records in the pool she's often found at Old Trafford.
Sport Wales caught up with her for a game of football on the roof of a Manchester hotel and tested her knowledge on all things Manchester United.
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