Watch all the action from the season finale, live on Sky Sports Arena beginning on Sunday
Friday 10 November 2017 16:36, UK
The line-up for the eight-man field at the ATP Finals is completed after Jack Sock secured the last remaining spot with victory at the Paris Masters.
The year-long campaign on the ATP Tour culminated with a frantic battle for the remaining two available places at London's O2 with David Goffin and Sock punching their tickets to the denouement of the tennis calendar.
Rafael Nadal and Roger Federer, who have shared the four Grand Slams on offer this year, will headline the field but will face stern competition as players aim to finish their season on a high, live on Sky Sports.
Here we profile the eight players descending on the capital for the season-ending showpiece...
Titles: 6
Grand Slams: French Open; US Open. Masters: Monte Carlo, Madrid; ATP 500: Barcelona, Beijing
Nadal has enjoyed a strong season underlined by his six tournament victories, including the French and US Open titles, but significantly his year-end finish as the world No 1.
The 31-year-old 16-time Grand Slam winner has remained injury-free for the majority of the campaign despite battling with pain in his troublesome right knee and has exceeded expectations while several of his fellow professionals have been forced to sit out the majority of the second half of the season.
The Spaniard was forced to pull out of the Paris Masters last week, a tournament he has never won, with a recurrence of the injury but will be determined to end his year in style under the lights in London.
Titles: 7
Grand Slams: Australian Open; Wimbledon. Masters: Indian Wells, Miami, Shanghai; ATP 500: Halle, Basel
Along with Nadal the Swiss great has put together a stellar campaign which has seen the 36-year-old lose a mere four matches all year.
Federer has picked up two Grand Slam titles in Melbourne and at Wimbledon to reach 19 overall and, despite finishing the year as world No 2, has beaten Nadal on each of their four meetings this season.
He has pocketed a season's best seven titles including in front of his home faithful in Basel where he overcame an in-form Juan Martin del Potro to gain some form of revenge for his quarter-final exit to the Argentinian at the US Open.
Titles: 5
Masters: Rome, Montreal; ATP 500: Washington: ATP 250: Montpellier, Munich
Zverev has enjoyed a breakthrough campaign on tour in 2017 moving to world No 4 after starting the season in outside the world's top 20.
The charismatic 20-year-old, who only turned professional in 2013, has claimed five titles this year including his first two at Masters 1000 level - on the hard courts at the Montreal Masters, which culminated by beating Federer, and earlier on clay at Rome.
The temperamental German has failed to progress past the fourth round stage at any of this year's four Grand Slams but has failed to register a victory over Nadal.
Titles: 1
ATP 500: Rio
The 24-year-old has been one of the most active players on tour this year but has only one title to his name which came at the Rio Open.
Thiem, who has climbed to a career-high world No 6 this season, has only picked up three victories against the top 10 this year with them all coming during the clay court season - the Austrian's favourite surface.
This year's French Open semi-finalist has already suggested he faces a tough challenge in London admitting it's not his strongest surface and comes into the event with little or no recent form of note.
Titles: 1
ATP 250: Istanbul
Cilic's victory over Milos Raonic at the Istanbul Open maintained the big-serving Croatian's 10-year run of winning at least one ATP Title per campaign but missed out on a second title by losing to Feliciano Lopez in the Queen's final.
The 29-year-old former US Open champion, like many of his compatriots on the circuit, has been affected by injury, notably missing the Montreal Masters and Cincinnati Masters with an abductor issue.
Despite only making the third round at Flushing Meadows on his return many believe he is the most likely to provide competition to Nadal and Federer on the indoor hard courts at The O2.
Titles: 3
Masters: Cincinnati; ATP 250: Brisbane, Sofia
The Bulgarian has enjoyed his best campaign on tour for several years securing his first titles since 2014, including a first Masters title, reaching a second Grand Slam semi-final on his way to a maiden ATP Finals appearance.
Dimitrov, 26, has enjoyed little success at the Grand Slams this campaign aside from his run to the semi-finals in Melbourne where he succumbed to Nadal in a five-set thriller.
His greatest sustained spell of form came during the American hard court season where he won his first Masters 1000 title in Cincinnati, winning the tournament without losing a set before a semi-final appearance in Beijing and losing to Del Potro in Stockholm.
Titles: 2
ATP 500: Tokyo; ATP 250: Shenzhen
Goffin confirmed his spot in London thanks to a run to the third round in Paris. He became the first Belgian to play at the ATP Finals in 48 years following his appearance last year as an alternate.
The 26-year-old's best run at a Grand Slam this year came at the start of the campaign when he reached the quarter-finals at the Australian Open but his progression to the Monte Carlo Masters semi-finals, where he beat top 10 players Thiem and Djokovic underlined his competitive abilities.
The Belgian claimed his first tour title on the ATP Tour since 2014 with victory over Alexandr Dolgopolov at the Shenzhen Open before making it back-to-back titles with the Japan Open crown.
Titles: 3
Masters: Paris; ATP 250: Auckland; Delray Beach
The American has enjoyed an up-and-down 2017 which started strongly and ended in successful fashion against all likelihood. Sock began the week in 24th place in the ATP Race To London but as players in contention for London failed to impress the 25-year-old grew in stature as the week progressed.
The new year-end American No 1 recovered from a 5-1 deficit in his opening round encounter against Kyle Edmund to storm through to a maiden Masters 1000 crown.
Sock's title in the French capital is a career-best third title of the year after victories in Auckland and Delray Beach at the start of the season with Pablo Carreno Busta the unfortunate man to miss out on an appearance in London.
The season-ending extravaganza ATP Finals at London's O2 ends another memorable year.
All the action will be covered via our website www.skysports.com/tennis with live blogs, reports and expert analysis as the season reaches its climax.
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