Not that cash will be the motivator for world number one Novak Djokovic, Rafa Nadal, Dominic Thiem, Tsitsipas, Daniil Medvedev, Alexander Zverev and debutants Andrey Rublev and Diego Schwartzman when the tournament's 50th edition starts on Sunday.
World No 5 David Ferrer will lead Spain's bid to claim their fourth Davis Cup title in five years when the holders take on the Czech Republic in this month's final in Prague.
Roger Federer wants more blood testing done in tennis to help keep the sport clear of doping, the 17-time Grand Slam champion said on the eve of the ATP World Tour Finals.
Russia's Nadia Petrova thrashed top-seeded Dane Caroline Wozniacki 6-2, 6-1 on Sunday to secure her maiden Tournament of Champions trophy and a 13th career title.
The Indian pair of Mahesh Bhupathi and Rohan Bopanna booked the final berth at the Barclays ATP World Tour Finals in London after advancing to the semifinals of the BNP Paribas Masters in Paris.
Roger Federer has secured his place in the ATP Finals for a record 15th time after the Swiss world number three won a record eighth Wimbledon title on Sunday, the Association of Tennis Professionals confirmed on Monday.
Third seeds Leander Paes and Radek Stepanek began their campaign at the season-ending World Tour Finals with a straight sets victory over seventh seeds Aisam-ul-haq Qureshi and Jean-Julien Roger, in Group 'A', in London, on Wednesday. The Indo-Czech pair beat the Pakistan-Dutch combo, runners-up at the Paris Masters last week, 6-4, 7-5.
The Indian pair of Mahesh Bhupathi and Rohan Bopanna squandered two match-points before losing to Jonathan Marray and Frederik Nielsen in their opening match at the ATP World Tour Finals, in London, on Tuesday. The Indians, making their debut as a pair in the elite season-ending event, lost their Group B match 6-4, 7-6(1), 10-12 in 96 minutes.
Indian tennis star Sania Mirza said it's an honour to team up with 18 time Grand Slam winner Bob Bryan in the mixed doubles of the 2013 Australian Open.
Jerzy Janowicz continued to be a thorn in the side of higher ranked opponents as he reached the Paris Masters final with a 6-4, 7-5 win over local favourite Gilles Simon on Saturday.
Novak Djokovic celebrated his return to the summit of world tennis with a stroll into the quarter-finals at the Paris Masters as outclassed Damir Dzumhur had to retire with injury in the second set of their third round clash.
Roger Federer made a comfortable start to his quest for a 100th title, despatching Fabio Fognini in straight sets to ease into the quarter-finals at the Paris Masters on Thursday.
Leander Paes and Stanislas Wawrinka shocked 2014 Wimbledon champions Vasek Pospisil and Jack Sock 7-6(4), 3-6, 10-3 to make it to the doubles quarter-finals at the ATP Masters Western and Southern Open, in Cincinnati, on Tuesday.
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.
With the ATP Finals coming up next month, Nadal said on his Facebook page he had made the decision to pull out of next week's Basel tournament after getting medical advice.
Home favourite Roger Federer barely broke sweat as he beat David Goffin 6-2, 6-2 to win the Basel Indoor title for the sixth time on Sunday.
With 1,500 points available for an undefeated champion next week, the tournament could produce a thrilling climax with Murray and Djokovic, who have never met at the O2, facing off in the final for the year-end number one ranking.
The men's tour must look after the welfare of top players like Novak Djokovic rather than expect them to turn up injured at tournaments so they do not lose out on bonus payments, former British number one Greg Rusedski said.
Roger Federer's 6-3, 7-5 win over Argentine Juan Monaco in the quarter-finals of the Paris Masters made him only the seventh player in the Open Era to win 800 singles matches on the Tour. His career-record now stands at 802-186.
The Paris Masters win catapulted Rohan Bopanna and Aisam-Ul-Haq Qureshi to fifth from seventh in the latest ATP Team Rankings, issued on Monday.
World number one Novak Djokovic still has some way to go before he can boast the same aura Roger Federer and Rafael Nadal have on the circuit, according to Frenchman Jo-Wilfried Tsonga.
Tomas Berdych and Jo-Wilfried Tsonga were just one win from securing places in the season-ending ATP World Tour finals after they safely moved into the third round of the Paris Masters on Tuesday.
Spaniard Fernando Verdasco overcame a sluggish start to beat Marin Cilic 3-6, 6-2, 6-3 at the Paris Masters on Monday and set up a second round meeting with Tomas Berdych.
The opening match in the Pete Sampras Group produced a feast of stylish backhands from both players but it was Dimitrov, the first Bulgarian to qualify for the tournament in its 48-year-old history, who overcome some late jitters to prevail.
Roger Federer claimed an eighth Swiss Indoor title when he outlasted Argentina's Juan Martin del Potro 6-7(5), 6-4, 6-3 in front of a partisan Basel crowd on Sunday.
The 22-year-old, 6ft 6in Russian, already the owner of two indoor hard court titles this year, moved one step away from the biggest title of his career at the Bercy indoor arena, crushing his Austrian friend in 70 one-sided minutes.
Novak Djokovic reached the Paris Masters final for the sixth time
The season-ending championship title eluded Mahesh Bhupathi yet again as the Indian Davis Cupper and his partner Max Mirnyi lost the summit clash of the World Tour Finals to Daniel Nestor and Nenad Zimonjic in London on Sunday.
Swiss third seed Roger Federer, looking to become only the second player after Andre Agassi to win titles at Roland Garros and Bercy, dropped just 10 points on serve against Czech Tomas Berdych as he set up a meeting with Frenchman Jo-Wilfried Tsonga, who saw off American John Isner 3-6, 7-6, 7-6 in the other semi-final after saving three match points.
Andy Murray's winning streak came to an end when the world number three slumped to a 4-6, 7-6, 6-4 quarter-final defeat at the Paris Masters after a three-hour tussle against the fifth-seeded Czech Tomas Berdych on Friday.
Novak Djokovic ran into a spot of bother before seeing off Davis Cup team mate Viktor Troicki 4-6, 6-3, 6-1 to secure his place in the quarter-finals of the Paris Masters on Thursday. Czech Tomas Berdych booked his place for the ATP World Tour Finals with a 7-5, 6-4 win over Serb Janko Tipsarevic.
Nadal, 31, pulled out of the Paris Masters before his quarter-final match last week after experiencing discomfort in his right knee during his third-round win over Pablo Cuevas.
World number four Andy Murray came from a set down to sink Argentine David Nalbandian 2-6, 6-4, 6-3 in the Paris Masters second round on Wednesday.
Roger Federer has backed calls to shorten the tennis calendar to protect players from burnout by creating a six week off-season.
Novak Djokovic bolstered his hopes of holding on to his World No 1 status until the end of the season with a 6-2, 6-3 defeat of big-serving Canadian Milos Raonic to retain the Paris Masters title on Sunday.
Frenchman Fabrice Santoro, once nicknamed "the magician" by Pete Sampras for his habit of mystifying bigger, stronger opponents, could perform one final, record-breaking trick before his remarkable career ends.
World number two Rafael Nadal said on Tuesday tennis is free of doping and repeated his view that the testing procedures are too tough. Nadal, who had previously accused controllers of "harassing" the players, said he has a problem with players having to inform anti-doping authorities of their whereabouts on a daily basis.
World number one Novak Djokovic had enough on his plate already on Wednesday without marauding Russian Daniil Medvedev pummelling him to a shock 6-3, 6-3 defeat at the ATP Finals.
Rafael Nadal kept winning the hard way at the Paris Masters on Thursday, overcoming fellow Spaniard Tommy Robredo 6-3, 3-6, 7-5 to reach the quarter-finals. Nadal, who saved five match points before taming Nicolas Almagro in another all-Spanish battle on Wednesday, needed two hours and 20 minutes to shrug off a brave challenge from Robredo, seeded 14th in the indoor event.
Marat Safin, widely regarded as one of the most gifted players of his generation, brought down the curtain on a chequered career when he bowed out to US Open champion Juan Martin del Potro in the Paris Masters.