(4) Andy Murray
- DOB: 15/05/1987
- Nationality: GBR
- Became Pro: 2005
- Height: 1.91
New world number four Andy Murray once again carries British hopes on his shoulders at this year's ATP World Tour Finals.
There has never been a British winner of the end-of-year showpiece in its 40-year history, however the London crowd will be hoping their hero can rewrite history this time around.
Murray is another player who has suffered the affects of another gruelling ATP Tour season, a niggling wrist injury ruling him out of action since the middle of September.
His absence from the Middle East events saw him relinquish his world number three ranking to China Open winner Novak Djokovic, however the Scot will be looking to reassert his dominance in London.
The 22-year-old has continued to make promising strides in 2009, titles at Valencia, Montreal, Queen's, Miami, Rotterdam and Doha evidence of his quality, particularly on the hard courts.
His Grand Slam performances have been the only cause for concern, a semi-final run at Wimbledon his highlight - defeat to Marin Cilic in round four at Flushing Meadows his biggest low.
Murray qualified for the Masters Cup for the first time in 2008, breezing into the semi-final stage with wins over Andy Roddick, Gilles Simon and Roger Federer before defeat to Nikolay Davydenko.
Fitness permitting, he'll be there or thereabouts inside the O2.
Ten-year Grand Slam History