Andy Murray insists victory at the ATP World Tour Finals would be an achievement on a par with winning a Grand Slam title.

The World No. 4 was handed a tough looking draw for the London tournament which starts on Sunday – with Roger Federer and US Open champion Juan Martin del Potro in his group.

Murray has an impressive record against Federer, winning six of their last nine battles, but with a hectic schedule planned at the prestigious eight-man event, the 22-year-old is expecting a tough ride.

“At the end of your career you’re remembered for grand slams,” said Murray – whose group also contains Spain’s Fernando Verdasco.

“But to win something like this, you have to beat five of the best players in the world in consecutive matches if you want to lift the trophy, which is a very difficult thing to do.

“In my group Federer is the best in the world, del Potro has won the US Open and Verdasco has just had his best season to date.

“You might even have to beat a Federer or a Nadal twice, so it’s a very tough thing to win.

“Obviously I look forward to playing Roger. It’s a tough group but if I play well I think I have a good chance of qualifying.”