Frances Tiafoe‘s run at the US Open ended Friday with a loss to No. 3 seed Carlos Alcaraz in the semifinals. After being down in the match, Tiafoe had forced a fifth set, delighting the Arthur Ashe Stadium crowd — which included Michelle Obama. But it was the 19-year-old and world No. 4 from Spain who pulled through, 6-7(6), 6-3, 6-1, 6-7(5), 6-3 in four hours, 19 minutes.