Roger Federer survived a stiff challenge from American upstart Frances Tiafoe to advance in five sets at the US Open on Tuesday night.
The third-seeded Federer escaped with a 4-6, 6-2, 6-1, 1-6, 6-4 win over the 19-year-old at Arthur Ashe Stadium.
"It was more than a test," Federer said after the victory. "It was a good one."
Tiafoe, a Maryland native who now resides in Florida, is ranked 70th in the world and has never been past the second round at a Grand Slam tournament.
Fresh off his eighth Wimbledon victory, Federer is looking to add his sixth career US Open title as the men's draw is fairly wide open with several other big names, including Andy Murray and Novak Djokovic, not playing in this year's tournament.