US Open favourite Roger Federer survived a huge scare to battle past 19-year-old Frances Tiafoe 4-6 6-2 6-1 1-6 6-4 in the first round at Flushing Meadows.
FedererвЂ™s tilt for a third Grand Slam title of 2017 looked to be under threat when he dropped the first set, with American Tiafoe thriving more so than cowering on his Arthur Ashe debut.
The five-time US Open champion drew on all of his experience to quell TiafoeвЂ™s power and take a 2-1 lead, but the youngster failed to read the script as he took the match to a deciding set.
It was Tiafoe who cracked first in a tense finale, but the drama continued as Federer failed to convert a match point when 5-3 up, before going on to be broken back by the world number 70.
However, Federer bounced back to seal victory in the following game at 11:52pm local time, keeping his hopes of a 20th Grand Slam crown alive.
Playing in his 90th match in New York, Federer started slowly under the roof and was broken in the opening game by the NextGen hopeful.
TiafoeвЂ™s big-hitting continued to unsettle Federer, and the teenager maintained his advantage to take the first set after 36 minutes вЂ“ a feat which no player managed to achieve on the SwissвЂ™ journey to Wimbledon glory in July.
Federer was forced to dig deep in his bid to avoid a first-ever opening round defeat at Flushing Meadows, and he finally broke Tiafoe in the fourth game of the second set.
Fortune started to favour Federer as a net cord brought up three set points at 5-2, and the 36-year-old converted the second to square the match at 1-1.
The veteran began to dominate proceedings on court as TiafoeвЂ™s strokes became wilder and less accurate. An early break fell FedererвЂ™s way in the third, and it was one-way traffic for the remainder of the set as he wrapped it up in 28 minutes.
However, the fourth set did not play out as many expected, with two breaks of the Federer serve helping Tiafoe clinch it 6-1 in 23 breath-taking minutes.
The Arthur Ashe Stadium reached fever-pitch as both players stepped out for the final set, and it was Federer who broke first against an opponent who was playing in just the third five-set match of his career.
Federer then found himself serving for the match in the ninth game, but after failing to convert a match point, Tiafoe produced two stunning winners to break back.
But the match lasted just one game later, as Federer broke Tiafoe to seal victory after two hours and 40 minutes on court.
Blaz Kavcic or Mikhail Youzhny await Federer in the second round вЂ“ the pair were unable to complete their match on Tuesday due to heavy rain.
Novak Djokovic beat South African eighth seed Kevin Anderson 6-2 6-2 7-6(3) to win the Wimbledon men's singles title for the fourth time on Sunday.
The Wimbledon final is today and bet365 will be streaming it worldwide, live online through the In-Play section of the website.
Angelique Kerber denied Serena Williams a record-equalling 24th Grand Slam victory in the Wimbledon final as she triumphed 6-3 6-3 to win her third.
Novak Djokovic eventually battled past Rafael Nadal in their epic semi-final 6-4 3-6 7-6 3-6 10-8 - the second longest in Wimbledon history on its second day.
Kevin Anderson triumphed in a Wimbledon classic as he beat John Isner in a marathon five-set clash to reach the Grand Slam final.
Serena Williams stormed past Julia Goerges of Germany with a 6-2 6-4 victory to reach the final as she eyes an eighth title at Wimbledon.
Angelique Kerber was in blistering form as she swept past Jelena Ostapenko 6-3 6-3 to reach the final of Wimbledon.
Rafa Nadal came through one of the all-time great Wimbledon quarter-finals to beat Juan Martin del Potro in five sets and reach the last four.
John Isner beat Milos Raonic in four sets on Wednesday evening to reach the semi-finals of Wimbledon.