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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Marchand can handle Paris Olympics pressure - Bowman
Leon Marchand, 21-year-old French swimming star, breaks Michael Phelps' last remaining world record
Michael Phelps' Final Individual Swimming Record Broken by 21-Year-Old Leon Marchand, News, Scores, Highlights, Stats, and Rumors
Michael Phelps' Final Individual Swimming Record Broken by 21-Year-Old Leon Marchand, News, Scores, Highlights, Stats, and Rumors
French swimmer breaks Baltimorean Michael Phelps' last individual world record – Baltimore Sun
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Marchand 4:02.50 WR: Race Video & What He Said After Confining Phelps' 4:03.84 Epic To History - StateOfSwimming
Paris 2024: Leon Marchand World Male Swimmer, Energized