MELBOURNE, Australia —January 15, 2019—Frances Tiafoe rolled up his sleeve, flexed and slapped his biceps muscle five times to celebrate the biggest victory of his career, a 4-6, 6-4, 6-4, 7-5 comeback against two-time Grand Slam finalist and No. 5 seed Kevin Anderson in the Australian Open’s second round.

The 20-year-old Tiafoe trailed by a set and 3-0 in the second Wednesday before turning the match around as Anderson’s big serve slowed down because of problems with his right arm.

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