Murray aims to overthrow duo

Andy Murray is aiming to end Roger Federer and Rafael Nadal's dominance of Grand Slam events at the US Open in New York.

The 21-year-old British number one, who starts next week's tournament at Flushing Meadows against Argentina's Sergio Roitman, has enjoyed an impressive season with victories in Qatar and Marseille.
He also reached the Wimbledon quarter-finals and then claimed the Masters Series title in Cincinnati.
Murray now heads to the final Grand Slam of the season aiming to end the grip of Nadal and Federer on the big competitions as the pair have won 16 of the last 19 Slams.
The Scot is also confident of seeing off other potential contenders such as Australian Open champion Novak Djokavic.
Murray has a 2-1 career record over Federer, defeated Djokavic twice last month, but has lost all five matches he has played against top seed Nadal.
He said: "Nadal is obviously playing really well but I think this surface and Grand Slam he has struggled at.
"Federer is playing really well but his performance has dropped a little bit and beating Djokovic a couple of times recently has given me confidence."
He added: "It's hard, but I think if you want to win Slams, in any era, you will have to have beaten great players to do it.
"It's very hard to do, but it's definitely not impossible. You have to go into, for me anyway, every tournament to win.
"I always feel if you set a goal to reach the third round, if you do make it to the third round, you almost are satisfied with what you achieved.
"Set the goal high and try your best to win the tournament."