Britain's Andy Murray demonstrated his grit and guile to frustrate Argentine 24th seed Francisco Cerundolo and start the 10th anniversary of his US Open victory with a first-round win.
Murray, 35, eventually clinched the first set and then raced ahead in the second as Cerundolo became despondent.
The former world number one, who earned the first of his three major titles in New York, went on to win 7-5 6-3 6-3.
The Scot will play Australia's John Millman or American Emilio Nava next.
"It felt like five sets to me, it was tricky conditions, very humid and hot," said Murray.