Hwang Sunwoo and Kim Woomin took gold and silver in the men's 200m free at Korean Trials, making it the first time the nation has 2 qualifiers in the event.
With three sub-1:44 splits and the podium separated by less than a quarter of a second, the men's 4x200 freestyle relay final on Friday was a thriller.
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It will be a busy session for Kate Douglass, as the American takes on the final of the women's 100 free and 200 breast on the sixth night of racing in Doha.