Andy Murray has booked his place at the ATP World Tour finals despite his disappointing quarter-final exit from the US Open.
Murray, Rafael Nadal and Novak Djokovic all confirmed their places for the end-of-season tournament in London on the back of their performances in New York.
Murray told the ATP website: "It will be great to compete in London again for the first time since winning Wimbledon.
"It's a key focus for me for the rest of the season and I'll do everything I can to give myself the best chances of winning it. The atmosphere there is always special - to win it would be the perfect way to finish the season."
Roger Federer however still faces a battle to make the eight-man field, a situation that was unthinkable even six months ago.
Federer has been an ever-present at the Tour finals since 2002, winning the event six times, but the 17-times grand slam champion is at risk of missing out this time.
The Swiss is seventh on the Race to London rankings, just 130 points ahead of compatriot Stanislas Wawrinka - Murray's conqueror at the US Open - and Frenchman Richard Gasquet is also closing in.
Wawrinka could move above Federer when he competes at the Malaysian Open this month while Gasquet is in action at the Thailand Open where he is defending champion.
Federer, stunned by Tommy Robredo in the fourth round in New York, is not scheduled to play again until the Shanghai Masters in early October.