Roger Federer lit up the O2 Arena with a dazzling 6-4, 6-3 defeat of Novak Djokovic to hand the Serb an early ATP Finals exit and wreck his bid to end the year ranked number one on Thursday.
Tsitsipas had lost all five previous matches against the Russian, but turned the tables in impressive fashion.
Roger Federer beat Pete Sampras 6-4, 6-3 in the first of three Asian exhibition matches in Seoul.
The World No 1 put on a vintage display to beat the Spaniard in the final of the season-ending event on Sunday. His victory at the showcase eight-man tournament put him level with Ilie Nastase and one behind the record of five titles held by Ivan Lendl and Pete Sampras.
The Swiss ace is three titles shy of Pete Sampras's record of 14 Grand Slam victories.
'One year Borg worked on his serve, another year on the slice, the third year on his grip.'
Reader Karthik Marudur sent us this picture from Massachusetts.
The world number one, who has won 12 Grand Slam titles, said his aim is also to surpass Pete Sampras's record of 14.
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The world number two retained the RCA Championship title with a comfortable 6-2, 6-3 victory over Germany's Nicolas Kiefer.
'I had to learn to be patient. I am a different player and a different person than I was three years ago. I still believe I can repeat that 2015-2016 streak when I won four slams in a row, I wouldn't be here if I didn't.'
World No 2 Andy Murray's three-point contribution to Britain's defeat of Belgium in the Davis Cup final concluded one of the most remarkable years ever achieved in the competition by an individual player. Below are the key facts:
Only an early shock can prevent the runaway world number one from adding to his Grand Slam haul, according to former champion Jim Courier.
Robby Ginepri triumphed 4-6, 6-0, 3-0 after fellow American Taylor Dent quit with heat exhaustion in the third set.
Taylor Dent and Robby Ginepri will contest the first all-American final in Indianapolis since Pete Sampras beat Jim Courier 13 years ago.\n
List of Australian Open men's singles champions since the event began in 1905 (Australian unless stated):
or every elite athlete at the business end of their careers, a situation comes where they have to take a hard call, believes former India captain Sourav Ganguly.
'I always believed.' 'I kept on believing and dreaming I could get back'
Roger Federer's countless fans did not have enough of him on his rare Indian sojourn, and the Swiss superstar reciprocated their feelings saying that one day he will travel the 'beautiful country in a big way'.
Hewitt was outfought by the sixth seed who moved into the semi-finals in 88 minutes.
Henman has taken on American Paul Annacone as his part-time coach after splitting with Larry Stefanki in September.
With Wimbledon scrapped due to the pandemic, a flashback of some of the best moments from the last five championships at SW19.
Former Wimbledon champion Richard Krajicek says the Swiss world No.1 is like the replacement for Pete Sampras. 'He has so much ability, it is a joy to see him play.'
'Can Tendulkar recreate the magic of his youth?', asks advertising guru Sandeep Goyal.
The Swiss player has become the enigma of the tour, winning a succession of tournaments only to fail when it comes to the biggest stages.
Images from the US Open final played at Flushing Meadows on Sunday
Spain's Garbine Muguruza beat Serena Williams 7-5, 6-4 to win the French Open on Saturday and claim her first Grand Sam title. Take a look at the career of the 22-year-old.
World number one Roger Federer survived a scare from unseeded Borna Coric to beat him 5-7, 6-4, 6-4 in the BNP Paribas Open on Saturday and set up a final showdown with Juan Martin del Potro who cruised to a 6-2, 6-3 win over Milos Raonic.
Roger Federer claimed the 100th ATP title of his career by beating 20-year-old Greek Stefanos Tsitsipas 6-4, 6-4 in the final of the Dubai Duty Free Tennis Championships on Saturday.