Budapest - Lilly King of the United States claimed her second world record this week in winning the women's 50m breaststroke gold at the world championships on Sunday.
King clocked 29.40 seconds, breaking Ruta Meilutyte's four-year-old record of 29.48, with Russia's Yuliya Efimova taking silver at 0.17 back and America's Katie Meili earning bronze at 0.59.
This was the second world record the 20-year-old King has broken in Budapest after also lowering Meilutyte's time for the 100m breaststroke in winning Tuesday's final.
The victory was King's second this week over rival Efimova, who took bronze in the 100m final but had beaten the American over 200m with a commanding display on Friday when King finished fourth.
The American sparked a war of words at last year's Rio de Janeiro Olympic games when she branded the Russian a drugs cheat after Efimova's 16-month ban for doping which ended in February 2015.
Meili paid tribute to her American team-mate.
"I'm satisfied, that's my first time under 30 seconds," said the 26-year-old, who also took breaststroke silver over 100m.
"I think Lily always has a world record in her, she's been incredible this week, really fast, we're very proud of her."