American Katie Ledecky fluffy off censure to set an Olympic best in the 1,500-meter battery heat on Monday just times after behind to Australia’s Ariarne Titmus in the 400-meter battery medal event.

Ledecky won her heat with a time of 15:35.35 as the 1,500-meter freestyle made its Olympic debut at the Tokyo Aquatics Centre. The men’s side has extended competed for the event, but Tokyo was the first time female contestants contributed in the long-distance swim.

The superstar swimmer held off China’s Wang Jianjiahe and Germany’s Sarah Kohler in the fifth heat of the night. Ledecky grips the biosphere best in the occasion with a 15:20.48 in 2018.

The finals are set for Wednesday.

Ledecky was pending off a silver-medal finish in the 400-meter freestyle. She located behindhand Titmus with the second-fastest time in the past. She struggled by nearly a full-body distance before wrapping up a 3:56.59 mark. Legacy over just a second behindhand her with a 3:57.36.

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Astonishingly, Ledecky also raced in the 200-meter battery heat before taking the pool for the 400m and the 1,500m.

In the 200-meter, Ledecky narrowly beat out Canada’s Penny Oleksiak. Ledecky logged a time of 1:55.28 and Oleksiak had a 1:55.38 mark. Australia’s Madison Wilson finished third.