Andy Murray’s former coach Brad Gilbert believes the Scot’s new aggressive approach will help him in his quest for a first Grand Slam title (Murray 11/4 to win US Open).

The British number one has reached two Grand Slam finals to date and was beaten by Roger Federer at both the 2008 US Open and this years’ Australian Open.

The 23-year-old has come in for some criticism about his style of play over the past few years, with many pundits expressing a desire for the talented right-hander to play more attacking shots and not just rely on wearing down his opponent into making mistakes.

Murray appears to have heeded the advice and looked right back to his best when winning the recent Rogers Cup in Toronto, with an excellent all-round display in pulling off a straight sets victory over Federer in the final.

Gilbert, who coached the Brit for 18 months, feels that his former charge must continue to pay in the same style if he is finally to win one of the four big tournaments.

“I have never seen Andy Murray play more positive and aggressive tennis than in Toronto,” he said. “He did not rely on defence and it is so much more economical to play offensive tennis.

“By nature he likes to play defensive, he can weave tangled webs and get out of it, but it’s so much more enjoyable and fun to play offensive and win offensive and that’s what he’s doing and that’s what he needs to do to win majors.”

Murray lost to Mardy Fish in the quarter-finals of the Cincinnati Masters last week but has declared himself fit and raring to go as he looks to break the stranglehold of Federer and Nadal at the top of the sport. (Federer 9/4 fav to win US Open)