Frances Tiafoe Becomes First American Man Since 2006 To Reach U.S. Open Semifinals

Frances Tiafoe, the 24-year-old son of immigrants from Sierra Leone, followed up his monumental upset of No. 2 Rafael Nadal on Monday by knocking off No. 9 Andrey Rublev, 7-6(3), 7-6(0), X, to reach the U.S. Open semifinals.