The United States set a world record of three minutes and 50.40 seconds in the women's 4x100m medley relay final at the world championships on Sunday. The quartet of Regan Smith, Lilly King, Kelsi Dahlia and Simone Manuel helped the US better their own world record of 3:51.

US set world record, claim women's 4x100m medley relay gold

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US set world record, claim women's 4x100m medley relay gold