Andy Murray won a US Open final-record 22-point tiebreaker against Novak Djokovic in the first set on Monday.
The 7-6 (10) score for Murray, who converted his sixth set point, made it the longest tiebreaker ever played in the tournament's men's title match.
The tiebreaker alone lasted 25 minutes.
There had been two 20-point tiebreakers.
In 1987, Ivan Lendl - now Murray's coach - lost the first set 7-6 (9) to Mats Wilander before coming back to win the title. In 1976, Jimmy Connors won the third set 7-6 (9) during a four-set victory over Bjorn Borg.