ROME Sweden's Sarah Sjostrom bettered the world record she set on Sunday to grab gold in the women's 100 metres butterfly final at the world swimming championships on Monday.
The 15-year-old surged home in 56.06 seconds, ahead of second-placed Jessicah Schipper of Australia and bronze medallist Jiao Liuyang of China.
Sjostrom destroyed the world record in Monday's heats to set a new mark of 56.44 but easily surpassed that on a warm Rome evening.
"I don't know what is happening right now. It's unbelievable," she told reporters. "This is my best year but I have many years in front of me. I can do better."
Six world records fell on Sunday's first day of competition. Critics have blamed hi-tech suits for the glut of records in recent months and governing body FINA is poised to ban non-textile suits from January and bring back trunks for men.
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