Andy Murray feels he is close to hitting top form after an impressive victory over Jo-Wilfried Tsonga set up a blockbuster US Open quarter-final against Novak Djokovic.

Murray had not beaten a top-10 player since his emotional victory over Djokovic to win Wimbledon more than a year ago but played a very fine match in the New York heat to defeat ninth seed Tsonga 7-5 7-5 6-4.

It maintained the Scot’s impressive record of having reached at least the quarter-finals of every grand slam tournament he has played in for the past four years.

The performance was certainly a step up from Murray’s first three matches in New York, with his only two lapses coming at the start of the second and third sets and quickly corrected.

The eighth seed said: “I don’t feel like I’m that far away from playing my best tennis. It’s still obviously a long way from trying to win the tournament but it’s only nine sets now, three matches, and I’ll just try and take it one set at a time.

“I’m maybe five, six days away from potentially winning another grand slam. I know there is a lot of work to be done between now and then. But I’m putting everything out there on the courts, it’s the last slam of the year. I hope I can play well.”

There was a lot to like about Murray’s performance on Monday against a player who last month beat Djokovic, Murray, Grigor Dimitrov and Roger Federer back to back to win the Masters title in Toronto.

Murray had been keen to play down the top-10 statistic in the build-up to the match, and it was a similar story afterwards, but it certainly appeared to be a huge win.