Recently, 24-year-old Louise Hansson hit the personal best in the 100 meter butterfly during a test race in England.

The fine form seems to hold for today during the Swim Open at Eriksdalsbadet in Stockholm, Hansson stood for a new canon time at the same distance.

Her personal best, which is from 2019, was at 57.10.

Today she swam at 56.73, a proper trim of her personal best.

The time was well enough for victory in today's race.

It is also very close to the year's best in the world.

Only Emma McKeon, Australia, has swum faster in the distance this year.

CLIP: Louise Hansson set personal best in secret test race (April 7, 2021)

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Louise Hansson put personal best in a secret test race Photo: Bildbyrån