|ATP World Tour finals|
|Venue: O2 Arena, London Dates: November 11-18|
|Coverage: Stay tuned live across BBC TV, Radio, BBC Sport website and mobile app. An online text comment is available in selected games.|
Raphael Nadal will pass the November ATF finals in London and will carry out surgical operations for ankle injuries.
Nadal abandoned last month's Paris masters with a stomach muscle injury, which means that Novak Djokovic replaced him as the world's first number.
Spaniard, 32, said that as he is still suffering from this injury, he "will use this moment" and will carry out an anesthetic surgery.
American John Isners takes Nadal at the eight-player tournament in London.
The solid court tournament will be held on Monday at the BBC One's The One Show at noon. 19:00 GMT.
On the social media post, the 17th-place Grand Slam Champion Nadal wrote: "It's been a difficult year, a very good tennis level when I am able to play, and at the same time very bad, as far as injuries are concerned.
"Unfortunately last week in Paris there was a problem with my stomach, and besides, I have a free body site in the ankle joint, which should be abolished today in the surgery room.
"It's true that we discovered it for a long time, and from time to time it worried me. However, since the problem with the abdominal muscle also prevents me from playing in London, we use the moment to free our bodies and prevent future problems.
"That's the way I hope the next season will be full of strength."
Nadal has departed from two of the three solid events that he has competed this season – the Australian Open and the US Open – but won the other, the Rogers Cup.
Spanish vacation in London means the 14th Grand Slam champion Djokovic, who has completed his career for the fifth time in the fifth year in the world for the fifth time: it's with Roger Federer and Jimmy Connors, and one behind Pete Sampras.
BBC tennis correspondent Russell Fuller
Over the last seven years, Nadal has only been able to win his place in the final for the last six years three times – and last season it was far from fitness, as he only pulled out one match.
Every year you win the 11th in Roland Garros, Barcelona and Monte Carlo, it's almost unhealthy, but it's been a deeply disturbing year for Nadal.
He had to play 10 tournaments to combine hip, knee, stomach and ankles, as well as fatigue, as well as the Australian Open Quarterfinals and the United States Open Semifinals.
Since Nadal is waiting eight weeks before the new season, Novak Djokovic now knows he will finish his career for the fifth time as the world's first.