Murray confident of joining grand slam club soon 

Source: ReutersAndy Murray celebrates his win over Jo-Wilfried Tsonga

Andy Murray was left in the shade by Juan Martin del Potro this year as the gangly Argentine made his grand slam breakthrough although the Briton is confident his time will arrive soon.

Del Potro, at 21 a year younger than Murray, stunned Rafael Nadal and then Roger Federer to win the US Open in September meaning Murray is now the odd one out -- the only member of the world's top five without a major title on his CV.

He gets a chance to prove his credentials in London over the next week when he competes in the ATP World Tour Finals and believes winning the tournament is the next best thing to a grand slam.

"This tournament is just behind the grand slams because you have to win five matches, or four matches, against the top players in the world," Murray, who starts his round-robin matches against Del Potro on Monday, told reporters.

"You might even have to beat the number one or number two in the world twice to win the event so it's not quite the same as a grand slam but it's a huge, huge tournament."

Slam chances

Murray has grown tired of fielding questions about his failure to win a grand slam this season.

He pointed out he equalled his best run at the Australian Open and went further than ever before at Roland Garros and Wimbledon, reaching the quarter-finals and semis respectively.

"Everyone views it a little bit differently but I still believe that I have a few chances, maybe one or two more chances, to win a grand slam," said Murray who claimed his sixth title of the year in Valencia earlier this month.

"The year has been a successful one. For some people grand slams are the be-all and end-all. I want to win one, I'm trying my best to win one and I'll work as hard as I can.

"My consistency this year has been superb. Physically, I've felt like I've been a lot better this year. I've got a better record against all the top players this year, so it has been my best year on tour without question."

Del Potro said he was looking forward to facing Murray in the opening action in London but admitted he was surprised the Scot had yet to win one of the game's big prizes.

"I am surprised, yeah, a little bit. I'm sure that it was one of his goals for this year," said Del Potro. "For me I was thinking more next year or 2011 so for me it came early.

"But Murray is a great player and he will have 20,000 people cheering for him on Sunday so it's going to be tough."