The 2019 Nitto ATP Finals begin in London tomorrow, with the top eight men in tennis set to battle it out for the prestigious, season-ending title.
Staged in the dramatically darkened 02 Arena, the eight-player field will compete for prize money totalling $8 million, with more than $2.7 million awaiting an undefeated champion.
The week-long showcase will begin with the players split into a pair of two four-man groups. After facing each group member in a round-robin format, the top two players from each group will then advance to the semi-final knock-out stage.
The winners of the respective semi-finals will meet in the final on November 17.
Group Andre Agassi
 Rafael Nadal
 Daniil Medvedev
 Stefanos Tsitsipas
 Alexander Zverev
Rafael Nadal  (Spain)
2019 titles: Rome (Masters 1000), French Open, Rogers Cup (Masters 1000), US Open
2019 record: 51-6; Career record vs. group: 11-1
World number one Nadal has enjoyed another excellent year on the tour, securing grand slam titles at both Roland Garros and Flushing Meadows. Impressive levels of consistency throughout the season also saw him reach the final of the Australian Open and the semi-finals at Wimbledon. Remarkably Nadal is still yet to taste victory at the ATP Finals, however the recently married Mallorcan will be desperate to improve upon his uninspiring 16-13 record at the tournament. Fans and spectators will be crossing their fingers and hoping that his recent withdrawal from the Paris Masters with injury was nothing more than a precaution.
Daniil Medvedev  (Russia)
2019 titles: Sofia (250 Series), Cincinnati (Masters 1000), St. Petersburg (250 Series), Shanghai (Masters 1000)
2019 record: 59-18; Career record vs. group: 6-6
The form player in the men’s game over the past five months, Medvedev has enjoyed a sensational season. Despite an early exit in Paris a couple of weeks ago, the Russian has won 29 out of his last 32 matches. The 23-year-old US Open finalist will be determined to make a mark in his maiden appearance at the season-ending event.
Stefanos Tsitsipas  (Greece)
2019 titles: Marseille (250 Series), Estoril (250 Series)
2019 record: 50-24; Career record vs. group: 4-10
Another player making his maiden appearance at the ATP Finals is 21-year-old Tsitsipas. Holding a 50-24 record, as well as victories over Nadal, Djokovic and Federer, this year has seen the Greek establish himself as a top-level player. After reaching the semi-finals of the Australian Open earlier in the year, struggles with consistency have since prevented him from breaking the domination of the top three.
Alexander Zverev  (Germany)
2019 titles: Geneva (250 Series)
2019 record: 42-23; Career record vs. group: 5-9
For the third successive year, the German will be part of the eight-man field in London. After his sensational victory in last year’s Finals, the 22-year-old will be aiming to defend his crown this year. While 2019 has been a disappointing year for Zverev, there is no doubt that he will be determined to salvage his season by triumphing in the capital again.
Group Bjorn Borg
 Novak Djokovic
 Roger Federer
 Dominic Thiem
 Matteo Berrettini
Novak Djokovic  (Serbia)
2019 titles: Australian Open, Madrid (Masters 1000), Wimbledon, Japan Open (500 Series), Paris (Masters 1000)
2019 record: 53-9; Career record vs. group: 32-25
Djokovic has continued his comeback from injury this year with another stellar campaign. Victorious at both the Australian Open and Wimbledon, the Serb has compiled a 53-9 record this season. Coming to London on the back of securing the title in Paris, Djokovic will be confident in his bid to claim his sixth championship at the ATP Finals. Winning the tournament, combined with Nadal failing to reach the semi-finals will see the 16-time grand slam champion return to the top of the rankings.
Roger Federer  (Switzerland)
2019 titles: Dubai (500 Series), Miami (Masters 1000), Halle (500 Series), Swiss Indoors (500 Series)
2019 record: 51-8; Career record vs. group: 25-30
The 38-year-old Swiss has secured another four titles this season – taking his career haul to 103. Despite failing to add to his tally of 20 grand slam titles, Federer held two championship points at Wimbledon this summer against Djokovic at 8-7 in the fifth, before falling agonisingly short. Opting out of Paris will mean that the Swiss will come to London fresh and ready to target a seventh title in the capital.
Dominic Thiem  (Austria)
2019 titles: Indian Wells (Masters 1000), Barcelona (500 Series), Austrian Open (250 Series), China Open (500 Series), Vienna (500 Series)
2019 record: 46-17; Career record vs. group: 9-9
The Austrian has had a mixed year on the court. The highs were a second straight French Open final and the biggest title of his career at Indian Wells, however, he failed to advance beyond the second round in any of the other three grand slams. This year will be the 26-year-old’s fourth appearance at the Finals in London, where he will be aiming to progress beyond the group stage for the first time.
Matteo Berrettini  (Italy)
2019 titles: Hungarian Open (250 series), Stuttgart Open (250 series)
2019 record: 42-21; Career record vs. group: 1-3
Who doesn’t love an underdog story? Last to secure qualification into the tournament, the 23-year-old is the first Italian to qualify for the ATP Finals in singles since Corrado Barazzutti in 1978. Ranked as low as 57 in mid-March, Berrettini has soared up the rankings, with an impressive run to the US Open semi-finals the main highlight of his season.
Daniil Medvedev vs. Roger Federer
Rafael Nadal vs. Novak Djokovic
Daniil Medvedev vs. Novak Djokovic