The Indian has won five ATP Masters 1000 titles with five different partners, although he has never won a major championship in men's doubles. Not bad for someone whose knees lack cartilage.
French Open champion Stan Wawrinka has become the fourth player to qualify for the season-ending ATP World Tour Finals in London.
One thing is beyond doubt after eight fabulous days of action at the ATP World Tour Finals -- tennis has found a spectacular new venue at London's space-age O2 Arena.
The Spaniard bore little resemblance to the player who once terrorised his opponents as he slumped to a 6-1, 7-6 defeat by Russia's Nikolay Davydenko.
Casper Ruud gained sweet revenge over Stefanos Tsitsipas as he beat the Greek fifth seed 7-5, 6-3 to win the Barcelona Open on Sunday.
Jannik Sinner secured the year-end world number one ranking by beating Czech 30th seed Tomas Machac in the Shanghai Masters semi-finals.
Home favourite Kei Nishikori defeated Frenchman Richard Gasquet 7-6(2), 6-1 in the semi-finals of the Japan Open on Saturday, setting up a final against Russian qualifier Daniil Medvedev.
Alcaraz will hope to bury memories of an injury-plagued start to last year when he missed the Australian Open
American Jack Sock clinched the last spot in the ATP Tour finals when he beat Serbian qualifier 5-7, 6-4, 6-1 to win the Paris Masters title on Sunday.
After registering a runner-up finish in the Qatar Open, Andy Murray set himself a target of registering 800 career wins.
World number one Novak Djokovic saw off Canadian Denis Shapovalov 6-3, 6-4 to win his fifth Paris Masters title on Sunday in a warning to his rivals ahead of the ATP Finals, while Ashleigh Barty finished the season in style by beating defending champion Elina Svitolina 6-4, 6-3 to add the WTA Finals title to her end-of-year world number one rank.ing
Photos from the ATP World Tour Finals matches played in London on Monday
Djokovic looked in fine nick in Shanghai, playing with consistency throughout the tournament to reach his fifth final at the ATP Masters 1000 event
Novak Djokovic has reportedly proposed to move the ATP World Tours Finals from London after 2015 by citing the need to expose the tournament to more cities around the world.
A final decision is expected by March based on the hosting and COVID-19 contingency proposals received from bidders.
World number three Stan Wawrinka beat Roberto Bautista Agut 7-6(8) 6-2 on Saturday and will play Alexander Zverev in the St. Petersburg Open final. The Swiss top seed, playing his first tournament since beating Novak Djokovic to win the U.S. Open title, wore down the Spanish fourth seed Bautista Agut after a tight first set.
A season that produced the biggest shake-up in men's tennis for more than a decade draws to a close next week with three ATP World Tour Finals debutants striving to sign off breakthrough years with a large exclamation mark.
Canada's Milos Raonic has withdrawn from the ATP Tour Finals in London due to injury and been replaced by Spain's David Ferrer.
Bob and Mike Bryan thrashed French duo Julien Benneteau and Edouard Roger-Vasselin 6-0, 6-3 to reach the final of the ATP World Tour Finals on Saturday.
World No. 2 Carlos Alcaraz defeated Tsitsipas in the 2021 US Open and in last year's Miami Masters and Barcelona Open.
Tallon Griekspoor prevailed in a high-voltage three-set final against Benjamin Bonzi to win his maiden ATP World Tour title.
The unanswerable question, of course, is whether Djokovic is the GOAT. That's a complex issue over which fans will forever bicker, observes Kanika Datta.
Medvedev will be glad to play the role of dream wrecker once again.
Sumit Nagal won the Heilbronner Neckarcup ATP Challenger event beating Alexander Ritschard of Switzerland
Rafael Nadal won two Grand Slams this year -- the French Open and the US Open -- to move within one of Roger Federer's record of 20 titles.
Nagal is coming off a title triumph during the Heilbronn Challenger last week, which happens to be his second Challenger title this season after the Chennai Challenger in February.
Rafael Nadal produced one of his best performances of the year to beat Andy Murray 6-4, 6-1 at the ATP World Tour Finals and move within sight of the semi-finals on Wednesday.
World number one Novak Djokovic said on Wednesday he hopes rival Roger Federer will return to competitive action soon and be able to compete with the best again after the Swiss great said he would miss the Australian Open in January.
Dominic Thiem stayed very much in the mix at the ATP World Tour Finals with a 6-3, 1-6, 6-4 victory over mercurial Frenchman Gael Monfils at the O2 Arena on Tuesday.
World number one Nadal will meet Greek teenager Stefanos Tsitsipas in Sunday's showpiece when he will target a record-extending 11th title in Barcelona a week after claiming the Monte Carlo Masters for the 11th time.
Djokovic helped Serbia to a 3-0 victory over Japan in their Group A opener on Wednesday at La Caja Magica where a revamped Davis Cup climax is being contested by 18 nations over seven days.
Marin Cilic and Milos Raonic booked their spots in the Paris Masters second round on Monday, while Roger Federer pulled out of the tournament with next month's ATP Finals on the horizon.
Defending champion Dmitry Tursunov fought back from a set down to upset top seed James Blake 4-6, 6-3, 6-4 and reach the final of the Indianapolis Championships on Saturday. The Russian will now face Gilles Simon after the Frenchman reached his first career ATP final in the United States with an exciting 6-3, 4-6, 6-4 win over local favourite Sam Querrey.
Sixth seed Nick Kyrgios battered Gael Monfils 6-4 6-4 and David Goffin outlasted Marin Cilic 7-5, 6-4 on Saturday to advance to the Japan Open final in Tokyo.
Nikolay Davydenko beat weary Argentine Juan Martin del Potro 6-3, 6-4 to claim the ATP World Tour Finals title at the O2 Arena on Sunday. The wiry Russian, who has climbed to sixth in the world this week, produced a faultless display to claim the biggest title of his career and a $1.5 million cheque.
Rohan Bopanna and Sumit Nagal have secured their Paris Olympics 2024 quotas for India
Indian tennis player Prajnesh Gunneswaran finish runner-up at the Orlando Open, losing the summit clash of the ATP Challenger event to American Brandon Nakashima, in Orlando.
French Open and Wimbledon champion Alcaraz, who won both of his previous meetings with Sinner this year, recovered from a slow start to wrap up victory in three hours, 21 minutes and improve his head-to-head record with the Italian to 6-4.
Novak Djokovic, who has won a record nine titles at Melbourne Park including the last three, has repeatedly declined to reveal whether he has been vaccinated against COVID-19, with Australian Open organisers Tennis Australia confirming that all players would have to be vaccinated to compete in Melbourne.