John Isner joined elite company when he saved four of five break points en route to beating compatriot Ryan Harrison 5-7 6-3 6-4 to win the Atlanta Open for the fifth time on Sunday.
Top seed Isner became the fifth American man to win the same event at least five times after Jimmy Connors, John McEnroe, Pete Sampras and Andre Agassi.
But it was tough going at times for Isner against eighth seed Harrison, who took the first set and was clearly the better player early in the second.
Isner appeared to be wilting in the heat but Harrison could not take his chances and his opponent squirmed out of trouble before pouncing when presented with a break opportunity.
A revitalised Isner never looked back in the third set as Harrison's frustration finally boiled over and he smashed his racket against the court.
It was the 14th career title for Isner, who lost a marathon semi-final 26-24 in the fifth set against Kevin Anderson at Wimbledon a fortnight ago.