Roger Federer survived a first round scare from Frances Tiafoe to claim a 4-6 6-2 6-1 1-6 6-4 victory over the American teenager.
The win keeps his hopes of a 20th grand slam title alive.
The 19-year-old Tiafoe broke Federer in the first game of the match before capturing the opening set.
Federer continues his stunning return from a six-month break after winning this year’s Australian Open and Wimbledon.
The Swiss ace got into gear after he broke Tiafoe to take a 3-1 lead in the second.
He then won nine of the next 10 games.
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