Sarah Sjostrom of Sweden has lowered her own world record in the 100-meter butterfly to win gold at the world swimming championships.
She led at the turn and won by a body length, touching in 55.64 seconds Monday night.
Sjostrom first broke the world record in the semifinals Sunday and she took it lower by a hundredth of a second in the final.
Jeanette Ottesen of Denmark finished second in 57.05 and Lu Ying of China was third at 57.48.
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