Andy Murray believes he is in his best physical shape for years after he made the third round of the US Open for the first time since 2016 on Wednesday.
Murray dropped the first set against American wildcard Emilio Nava, but the Scot powered back to win 5-7 6-3 6-1 6-0 in New York.
He will face 13th seed Matteo Berrettini in the last 32 on Friday, and the 35-year-old has his sights set on a lengthy run at Flushing Meadows.
"Physically this is the best I've felt in the last few years," he said. "My movement is by far the best it's been in a long time.
"I'm getting closer to where I want to be and hopefully I can have a deep run here."
Murray reunited with coach Ivan Lendl for the third time earlier this year – a decision he cites for his improved form.
"There's a lot of belief in the relationship because of results we've had in the past," he added.
"I trust that if I play with a game style he wants me to that will bring me success.
"It gives me confidence. He knows what it takes to win and perform well at this tournament. It's great to have him back."
Speaking about his next opponent, Berrettini, Murray said: "He's had a bit of an unlucky year.
"I know he got Covid at the beginning of Wimbledon. When he has been on the court he's done really well.
"We played a tough three-set match in Stuttgart. I'm expecting it to be really difficult but if I play well and my return's on point then I've got a good chance."