Rafael Nadal has withdrawn from the season-ending ATP Finals due to a persistent abdominal injury and will take the time off to have ankle surgery.
The Spaniard lost his place as world number one last week when injury forced him to pull out of the Paris Masters, with Novak Djokovic moving to the top of the rankings.
And Nadal will not get the opportunity to end the year on a high as he will not play in London, citing both last week's abdominal issue and a long-standing ankle problem for his absence.
"It has been a complicated year - very good at the tennis level when I have been able to play and, at the same time, very bad as far as injuries are concerned," Nadal wrote on Twitter.
"I have done everything possible to get to the end of the season in good condition, both to Paris and to London, doing things well, and I really wanted to play.
"Unfortunately, I had the abdominal problem in Paris last week and I also have a free body in the ankle joint that has to be removed in the operating room [on Monday].
"We had detected it for some time and it occasionally bothered me. However, since the problem in the abdominal muscle also prevents me from playing in London, we are taking the time to remove the free body and avoid future problems.
"This way I hope to be in full condition for next season."
Nadal has not featured on the ATP World Tour since retiring in the semi-finals of the US Open in September, also suffering this year with hip and knee problems.
The 32-year-old won the French Open - his 17th grand slam title - but he competed in just three hard-court tournaments in 2018, winning the Rogers Cup while retiring at both the Australian Open and at Flushing Meadows.
Djokovic is set to end the year as number one, having enjoyed a sensational run of results that saw him triumph at Wimbledon and the US Open.
15 de noviembre 2018
|Injured Lukaku out of Belgium-Iceland Nations League clash|
|Rooney ´passionate´ about future coaching career|
|Mehidy spins Tigers to victory despite second Taylor hundred|
|Rooney deserves special England day - Antonio|
|LeBron thinks back to his roots after latest milestone|
|Messi to return for Argentina next year - General manager Burruchaga|
|Walton salutes LeBron after he surpasses Chamberlain|
|Croatia´s Dalic and Modric not out for Spain revenge|
|Rondo to miss ´a few weeks´ with broken hand|
|Gabi, Juanfran hopeful over Oblak´s Atletico future|
|England rookie Wilson not comparing himself to Kane|
|WATCH: The baskets that moved LeBron James up the all-time NBA scoring list|
|LeBron moves into fifth on scoring list, 76ers fall in Butler´s debut|
|LeBron James into top five NBA scorers: Five quotes from league legends on his greatness|
|LeBron passes Chamberlain for fifth on all-time scoring list|
|Butler: 76ers need time to gel|
|South Africa lose 28-9 in Windies defeat|
|Delph impressed by ´special´ Sancho|
|Bolt may give up on football career despite ´a lot of offers´|
|We´re better than Dortmund – Wagner urges Bayern to respond|
|Raptors fans give former coach Casey standing ovation in return|
|Martinez hails Hazard leadership|
|Muller going through ´difficult´ period, says Low|
|Betances wants Yankees to sign Machado|
|Rays´ Snell, Mets´ deGrom win Cy Young Awards|
|Dinwiddie to debut Stan Lee-inspired shoes against Heat|
|Iberostar Tenerife and Segafredo Virtus Bologna stay perfect in BCL|
|Rooney wanted to finish career at Manchester United|
|Red Sox give manager Cora contract extension through at least 2021|
|WATCH: Ronnie O´Sullivan hits blue with calamitous break-off shot|
14 de noviembre 2018
|Matuidi: Mbappe has a great personality, like Ronaldo, Messi and Zlatan|
|Cilic beats Isner to hand Djokovic semi-final spot|
|Mendy undergoes knee surgery|
|Warriors´ Curry will not play during three-game road trip|
|Ramos refuses to retaliate after Lovren jibe|
|Qatar pull off shock win over Switzerland|
|Tuilagi could make England return against Australia|
|Rooney has earned England reward - Sarachan|
|Croatia thrashing means nothing now – Luis Enrique|
|Chelsea and Everton among Arnautovic suitors, claims agent|
|TJ Watt hopes to win NFL sacks race with brother JJ|
|Modric defends Ramos after Lovren comments|
|Southgate hails ´outstanding´ Delph as he talks up England strength in depth|
|No war with Manchester United over Fellaini, insists Martinez|
|Rooney to wear number 10 shirt against USA and receive armband from Delph|
|I don´t feel pressure of Liverpool expectations, claims Klopp|
|Steelers´ Roethlisberger texted Bell but ´didn’t hear back´|
|Reus and Kroos to sit out Germany´s clash with Russia|
|Van Dijk happy to recommend De Ligt if Liverpool ask|
|Sauber announce launch of junior programme|
|No ´breathtaking tennis´ in Djokovic´s win against Zverev|
|Curran: England spinners will be key in Kandy|
|Djokovic charges past Zverev to move closer to ATP Finals progression|
|Messi is a football alien - Malcom|
|Sky´s the limit for Sancho, says Dortmund team-mate Pulisic|
|Radwanska retires from tennis at 29|
|Maybe one day - Pulisic open to Premier League move|
|Suso ´proud´ of Real Madrid speculation but happy at AC Milan|
|Betis president convinced Lo Celso will stay|
|Injured Holder out of Bangladesh tour|
|Germany face relegation, final spots up for grabs - Nations League state of play|
|James Rodriguez out for several weeks with knee injury|
|Curran´s brilliant fifty rescues England´s innings|
|Lenglet: No problem with Dembele at Barca|
|Townsend rings the changes for Springboks clash|
|Claudio Ranieri´s managerial career in Opta numbers|
|Mahmudullah´s first century in eight years boosts Bangladesh|
|Fellaini gets the chop ahead of 31st birthday|
|Maradona: Solari will not last at Real Madrid|
|Molinari: Race to Dubai success would not surpass Ryder Cup glory with Fleetwood|