Wimbledon champion Andy Murray has confirmed he has pulled out of November's ATP World Tour Finals at London's O2 arena.
The world number three underwent surgery last month on a long-standing back problem, and it was always suspected he would miss the season-ending tournament in the English capital.
He was also forced to miss the French Open in May, before careful management allowed him to compete in Wimbledon, only for the problem to resurface as he helped Great Britain secure their spot in the Davis Cup World Group for 2014.
The operation was purely exploratory, but the Scotsman is still disappointed that he will remain absent from the November finals.
He said: "I'm really disappointed not to be playing this year, I love playing in front of my home crowd, it's a great atmosphere.
"All the players look forward to competing in London and I'll be doing my best to qualify again for the tournament next year.'
In the last five years, Murray has been a semi-finalist three times in the eight-man tournament, and had already qualified this year alongside Rafael Nadal, David Ferrer and Novak Djokovic.
Among those disappointed by Murray's withdrawal is tournament director Andre Silva, who said it's unfortunate that he will be unable to play, and of course he will be missed.
He wished Murray luck, and said: "We hope to see him back stronger than ever for the 2014 season."
Murray's absence leaves an additional qualification spot open, with Juan Martin del Potro, Roger Federer, Tomas Berdych, Stanislas Wawrinka and Richard Gasquet all in position to secure the remaining places.
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