Both men are 31 years old but have little else in common.
Images from Day 1 of the Australian Open in Melbourne on Monday.
'When you don't have that confidence to play three, four hours with a good backhand against Rafa, is just matter of time to get down your game'
World number two Nadal's fate will rest on his final group match against Tsitsipas.
Novak Djokovic proved to be a calming influence throughout
Bulgarian's Grigor Dimitrov claimed a first career win over former world number one Rafael Nadal at the eighth time of asking to reach the semi-finals of the China Open on Friday.
Spaniard Rafael Nadal will sharpen his grasscourt game at London's Queen's Club ahead of Wimbledon in June, organisers of the Aegon Championships said on Tuesday.
The Spaniard, who is renowned for his strict on-court routines, complained about the noise of the rowdy audience at his match, the din amplified by the closed roof on Arthur Ashe Stadium to protect the players from rain.
France's Jo-Wilfried Tsonga is presented with an award after playing his final match before retiring REUTERS/Pascal Rossignol
The French Open, traditionally held in May-June, was postponed earlier this year due to the COVID-19 pandemic and will now be held at Roland Garros from Sept. 27-Oct. 11.
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"At this point of the season for me, every victory is important, every title means a lot to me. This is not confidence for Wimbledon, this is an important victory for me and I'm happy for that today.
"At this point of the season for me, every victory is important, every title means a lot to me. This is not confidence for Wimbledon, this is an important victory for me and I'm happy for that today.
World number one Novak Djokovic had to work hard for a three-set victory over Hungarian Marton Fucsovics at the Paris Masters on Tuesday in his first match since losing the U.S. Open final in September.
Spain's talisman Rafael Nadal sealed a sixth Davis Cup title for his country on Sunday when they beat Canada 2-0 in the final of the revamped event.
Rafael Nadal put in some late-night overtime to drag hosts Spain into the Davis Cup semi-finals but Novak Djokovic's hopes were dashed in excruciating fashion as Serbia bowed out on Friday.
The retired American ace said women were willing to play five-set matches but used the entertainment industry to highlight her stance that athletes will get paid the same regardless of the duration of the matches.
Novak Djokovic, who won Wimbledon to take his major singles titles to 21, has opted not to be vaccinated against COVID-19. He said on Thursday he could not fly to New York for the year's final Grand Slam.
Tsitsipas had lost all five previous matches against the Russian, but turned the tables in impressive fashion.
Kei Nishikori's hopes of playing at the US Open have faded further after the Japanese former world number four revealed he had tested positive for COVID-19 for a second time.
Rafael Nadal suffered a shock 7-5, 6-3 defeat by Austrian Dominic Thiem in the Madrid Open quarter-finals on Friday, a result that means the Spaniard will lose the world number one ranking.
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Rafael Nadal's decision to end his season early means Cilic is actually holding the last berth for the eight-man showdown at London's O2 Arena.
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India's top-ranked singles player Ramkumar Ramanathan, of late, has developed a decent serve and volley game and comeback-man Yuki Bhambri is also comfortable playing on grass courts.
World number one Novak Djokovic once again declined to reveal whether he has been vaccinated against COVID-19 and said he is unsure if he would defend his title at next year's Australian Open.
Legendary Rafael Nadal was at his energetic best in his two wins as rampaging Indian Aces continued their sparkling run in the International Premier Tennis League (IPTL) with a 30-12 rout of the Philippines Mavervicks, on the opening day of the Indian leg of the event.
Nadal avenged his defeat to the 20-year-old Greek at the same stage of the Madrid Open a week ago
IMAGES from the Australian Open matches played on Wednesday.
Sumit Nagal is the only Indian in the men's field with Prajnesh Gunneswaran, ranked 132, missing out.
Rafael Nadal, after having suffered a 6-2, 7-6 (7-4) loss in the quarter-finals of the Swiss Indoors to teenager Borna Coric, has shut down his season to undergo appendix surgery.
Nadal paid tribute to his uncle and coach Toni after winning a record-extending 10th French Open title on Sunday.
Images from Monday's action at the Australian Open.
World number one Rafael Nadal, who is struggling to get any match practice before the Australian Open, will play an exhibition event at Melbourne Park in the week leading up to the season opening Grand Slam, organisers said on Monday.
Victory on Sunday would see Nadal become the first player to win the same grand slam 10 times in the modern era.
"But if you need a reminder of who he is, just look at his career stats and grand slams that he won."
ATP Tour remembered Maradona with a social media post saying "A champion and icon loved by all", accompanied with a picture of Maradona with Federer.