ANDY MURRAY last night insisted he is in the shape of his life as he attempts to end a 13-month winless streak by capturing a second US Open crown.

The Scot is now fully recovered from last September’s back surgery and firmly believes he’s in better nick than when when he triumphed in New York two years ago.

Murray rolls up at Flushing Meadows without a tournament victory since last summer’s epic Wimbledon success against Novak Djokovic.

However, after an intensive training block in Florida with new coach Amelie Mauresmo the British No.1 feels he is finally ready to get back on the winning trail.

Asked if he was fitter than when he won here in 2012 Murray said: “I would say so.

“It’s not a secret that my back had been troubling me for 18 months or so before I decided to take some time out and have the operation.

“It took me a little bit longer than expected to get back to full fitness and be able to train at 100 per cent but thankfully I’m now there. I worked incredibly hard in my last Miami training block and feel like I’m in the best shape I have been for a long time.

“Things with Amelie have been going well here this year on the practice court, we had a really good training block in Miami as well,

“I trained harder and smarter there than I had been able to for a long while, so that’s important, both mentally and physically.”

Murray also admitted he’s not worried by his failure to build on becoming the first British man to win at the All England Club for 77 years.

During that lean period the eighth seed has reached just one semi-final and has not beaten a player ranked in the world’s top 10.

He said: “I’m not concerned, it’s always tough when you come back from an injury and it always takes time to get the consistency.

“The standard on the tour is very high, there are no easy matches and it is difficult to reach the semi-final or final of a tournament let alone win a title.

“I’m confident that I’m back to where I want to be, it’s just a case of being patient and believing in myself.”

The absence of defending champion Rafael Nadal should make life easier for Murray and the rest of the US Open hopefuls.

The Scotsman feels the Spaniard’s absence has blown the tournament wide open although with Djokovic, Jo Wilfried Tsonga and Stan Wawrinka all in his half the draw has hardly been kind to him.

He said: “It’s an open tour now. You have a lot of younger guys playing well and also a few of the more experienced players picking up big wins.”

Murray opens his account against Robin Hasse, the big-hitter who took him to five sets at the same stage of the competition three years ago.

He said: “Robin and I have had some great matches over the last few years. He can be a tough player so I won’t be under-estimating him. I feel I can win more Grand Slams, that’s why I work hard every day.”