Rafael Nadal lost his opening set at the US Open for the first time in his career but was buoyed by his recovery to beat Rinky Hijikata.
But Nadal, who is yet to lose a grand slam match this year, hit back straight away and clinched a 4-6 6-2 6-3 6-3 victory to set up a second-round clash with fellow veteran Fabio Fognini.
Nadal said: “Obviously it was a tough match. I think I started not that bad the first couple of games but then I had some opportunities that I was not able to make.
“I think I didn’t play a good game with my serve. Then he had the break. Then I was a little bit nervous. First match here in New York after three years, night session, it’s always exciting. I went through this tough moment.
“But then I think I played better. It was not perfect. But I’m happy. Second match in 50 days, more or less. In some way it was not the day to play perfect. It’s a day to just make the job done, and that’s what I did. Happy for that.”
Italian Fognini handed Nadal his first ever grand slam loss from two sets up in 2015 on Arthur Ashe Stadium.
Nadal’s countryman Carlos Alcaraz, the third seed, was given a tough afternoon for two sets by Sebastian Baez before the Argentinian began to struggle with the brutally hot conditions and retired trailing 7-5 7-5 2-0.
Ninth seed Andrey Rublev and 11th seed Jannik Sinner were both pushed to five sets but came through against Laslo Djere and Daniel Altmaier, respectively.