Meet Léon Marchand, the French Swimmer Who Broke Phelps' Record

He beat the long-standing record by a smashing 1.34 seconds on Sunday, making him the world record holder in the long course 400m individual medley.

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Leon Marchand Breaks Michael Phelps' 400-Meter Individual Medley Record At World Aquatics Championships - myKhel

ASU swimmer breaks Michael Phelps' record - KYMA

Meet the 21-year-old French swimmer who just smashed Michael Phelps' world record by more than 1 second

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Marchand SMASHES Phelps' final WORLD RECORD in dominant Worlds 400 IM