Indian Davis Cupper Rohan Bopanna dropped out of the top-10 in the ATP doubles ranking after finishing last along with Pakistani partner Aisam-ul-haq Qureshi in group B of the season-ending finale in London.
The last time the Swiss maestro was this far down in the ATP rankings was all the way back on January 2001, when Federer was just 19 years old. Notably, he was yet to win his first tour title.
Italy's Sinner and Spain's Alcaraz have won two Grand Slams each this year, with Alcaraz beating Sinner in closely fought clashes at the French Open semi-finals and the China Open final.
Swiss tennis star Martina Hingis has said that Li Na's retirement was a loss to world tennis, while also crediting the Chinese ace of raising the game's profile in her home country and across Asia.
Andy Murray is performing a delicate balancing act as he prepares for a claycourt Davis Cup final and the ATP World Tour Finals on an indoor hardcourt at the O2 Arena.
Roger Federer produced a vintage performance to best Andy Murray 6-3, 6-4, 6-7, 6-3 and move into the semi-finals of the Australian Open.
Former world number one Rafael Nadal ended his season on Thursday as he has yet to fully recover from a wrist injury that has hampered him since the French Open in May.
Top seed Roger Federer was finally forced to work hard for a win at the Swiss Indoors tournament as he fought back to beat Adrian Mannarino 4-6, 6-1, 6-3 in his quarter-final on Friday.
Roger Ferdrer came up with a solid all-round display to beat world No 1 Rafael Nadal 6-4, 6-3 in the final and win the Shanghai Masters on Sunday.
As the new World No 1, Andy Murray could be troubled by the weight of expectations on his shoulders at the ATP World Tour Finals, but the Briton just wants to enjoy his new status.
World number six Milos Raonic has withdrawn from the French Open having failed to recover from a foot injury, the 24-year-old announced on Thursday.
It will be the second consecutive final for Paes and Angel, who also reached the final at Montrrey Challenger last week, ending runners-up to Jeevan Nedunchezhiyan and Marcelo Arevalo.
Should Carlos Alcaraz win Queen's final against Alex de Minaur he would reclaim the world number one ranking from Novak Djokovic.
Former world number one Rafael Nadal displayed more signs of a return to top form with a ruthless 6-2, 6-1 hammering of Stanislas Wawrinka to reach the semi-finals of the Shanghai Masters on Friday.
Rafael Nadal is expected to be released from a clinic in Barcelona on Tuesday after undergoing a successful appendectomy, the world number three's spokesman said.
Former world number one Novak Djokovic, the last surviving member of tennis' "Big Four", said he does not plan on stopping any time soon but admitted that the retirement of rivals Roger Federer, Andy Murray and Rafa Nadal has been overwhelming.
Retired tennis great Andy Murray has agreed to join Novak Djokovic's team and will coach him at the Australian Open next year, the Serbian 24-times Grand Slam champion said on Saturday.
Dimitrov was showing signs of fatigue from his three-hour third-round match earlier in the week and could do little to stop the Spanish world number three, who next faces Argentine Francisco Cerundolo.
Tsitsipas had lost all five previous matches against the Russian, but turned the tables in impressive fashion.
Sinner remains the man to beat at Melbourne Park even as doping officials seek a two-year ban for the world number one for failing two drugs tests last March.
Andy Murray has pledged 50 pounds ($77.59) to children's charity UNICEF for every ace he hits for the rest of the year after being moved by television images of refugees fleeing to Europe.
Third seed Alexander Zverev eased past home favourite Ugo Humbert
Frenchman Julien Benneteau caused a stir during an interview on French radio station RMC Sport on Sunday in which he said tournament referees were often kinder to Federer when it came to scheduling his matches.
World No 2 Federer became the first player to book his place in the semi-finals of the season-ending ATP World Tour Finals by seeing off a spirited challenge from 20-year-old Alexander Zverev of Germany 7-6 (8-6), 5-7, 6-1 in a thrilling round robin clash that lasted two hours and 11 minutes on Tuesday.
Yuki Bhambri and his Dutch partner Robin Hasse went down in straight sets to Ivan Dodig and Austin Krajicek at the Dubai Duty Free Tennis Championships.
The Serbian Wimbledon champion extended his win streak to nine, wrapping up the final in 75 minutes without facing a break point and booked his place at next month's ATP Finals.
Federer dismisses Nadal's suggestion to play ATP Finals on clay
There comes a moment in all great sporting careers when the puzzle fits together and for Kei Nishikori it arrived on a sweltering early September afternoon in New York.
The Swiss star underwent arthroscopic right knee surgeries in February 2020 and May 2020. Federer has played five tournaments since having those surgeries, all of which came this season.
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.
Sasikumar Mukund will aim for a winning return to the Davis Cup fold as India faces Togo in the World Group I Play-off.
Roger Federer's decision to withdraw means Switzerland can no longer take part in the nation-based event on January 3-12
Novak Djokovic claimed his third ATP World Tour title in a perfect season by beating top-seeded Spaniard Rafa Nadal 4-6, 6-3, 6-2 in the final of the Indian Wells ATP tournament on Sunday.
American qualifier Steve Johnson is through to his first ATP Tour semi-final after an emphatic victory at the Delray Beach Open on Friday.
Kei Nishikori has set his sights on making a grand slam breakthrough in 2017 after the Japanese world number five concluded a successful season in which he claimed one ATP Tour title, an Olympic medal and recorded a career-high 58 wins.
Unseeded Australian Daria Gavrilova upset fifth seed Petra Kvitova, of the Czech Republic, 6-2, 6-1 in the first round of the China Open on Saturday as Serbia's Aleksandra Krunic showed stunning powers of recovery to pull off her own shock win over sixth seed Elina Svitolina.
Former world number one Roger Federer looked like his old self when he beat Argentine Juan Martin Del Potro 6-3, 4-6, 6-3 at the Paris Masters on Friday to set up a semi-final clash with Novak Djokovic. Top seed Rafa Nadal destroyed local favourite Richard Gasquet 6-4, 6-1 as he stepped up his bid for a record sixth Masters Series crown in the same season.
Here is a quick glance of all the highs and lows from Nadal's stupendous career:
Milos Raonic of Canada will take on defending champion Novak Djokovic in the final of the Paris Masters.
Spain's Tommy Robredo shocked world number one Novak Djokovic 7-6(6), 7-5 on Thursday to move into the quarter-finals of the Western and Southern Open in Cincinnati.