IMAGES from Day 5 of the Wimbledon Championships at All England Lawn Tennis and Croquet Club on Friday.
Djokovic, the ninth seed, was originally scheduled to play Australian Open semi-finalist Chung Hyeon but the 22-year-old South Korean withdrew with a back injury about an hour before the match was due to start.
It is the first time the final match of the season will decide who is ranked number one.
Images from Day 3 of the US Open, at Flushing Meadows, New York.
Defending US Open champion Rafael Nadal retired from his semi-final against Argentine third seed Juan Martin del Potro on Friday with right knee issues. The world number one was trailing 7-6(3), 6-2 when he decided to call it a night.
IMAGES from Day 7 of the French Open, at Roland Garros, on Saturday.
Federer begins the pursuit of a record eighth Wimbledon title and a record 85th match win at the grass court major; Djokovic hoping to curb dismal slide
A dominant Rafael Nadal arrived at one career milestone on Thursday but the speed of the Spaniard's rampage through the early rounds of the French Open suggests his eyes are fixed firmly on another more significant one.
Claycourt master Rafael Nadal quickly adapted to his new surroundings at Roland Garros with a 6-2, 6-1, 6-3 demolition of German qualifier Yannick Hanfmann in the first round of the French Open on Monday.
The US Open reached an emotional climax on Sunday as the year's final grand slam paused amid heavy security before the start of the men's singles to remember those who died in the 9/11 attacks 15 years ago.
The Serb set up the breakaway PTPA on the eve of the US Open in September and resigned as head of the player council but last month he confirmed that he had been nominated by his fellow professionals for the current elections which he accepted.
Novak Djokovic equalled Roger Federer's all-time record for most weeks as ATP world number one
The Australian Open draw has opened up a potential can of worms for security organisers at Melbourne Park, with rival Serb and Croatian supporters to be thrown into close proximity for Novak Djokovic's second round match against Croatia's Ivan Dodig.
Nick Kyrgios has invigorated the Championship and men's tennis generally with firecracker personality
The Australian brought his extraordinary brand of improvised tennis theatre to the world's greatest tennis stage
Rafael Nadal rallied from a set down to ease past Fabio Fognini 4-6, 6-1, 6-2 in the Italian Open quarter-finals on Friday and set up a mouth-watering clash against long-time adversary Novak Djokovic for a place in Sunday's final. Djokovic plotted a similar path to the Spanish clay-court king when the Serb lost the first set against Japan's Kei Nishikori before recovering to win 2-6, 6-1, 6-3 and seal an open-era record 51st career meeting against Nadal.
Federer, Nadal and Djokovic had made it near impossible for their peers to live, and thrive, amongst them. But the coming generation, which hasn't been as scarred by defeat at the hands of the Big 3, may make tennis unpredictable again.
Rafa Nadal avoided a similar fate to beaten World No 1 Novak Djokovic when he dismissed French young gun Benoit Paire 6-3, 6-4 to claim a place in the third round of the Madrid Open on Wednesday.
Novak Djokovic handed Kei Nishikori a brutal lesson in hardcourt tennis as the Serb began his bid for a record fourth successive title at the ATP World Tour Finals with a 6-1, 6-1 win on Sunday.
A win for Djokovic would move him past Pete Sampras (14) to outright third on the list of Grand Slam title winners.
Nadal committed 30 unforced errors to Schwartzman's 17 and had his serve broken five times.
Images from Day 4 of the 2021 US Open in New York on Thursday.
Novak Djokovic felt he was a different player to the Wimbledon winner of old but comparisons were inevitable on Wednesday as the Serb rolled into the semi-finals for the first time since 2015.
Two-time champion Victoria Azarenka won a battle of former girls' champions at the Australian Open by easing past Czech Barbora Zahlavova Strycova 6-4, 6-4 on Saturday to advance to the fourth round at Melbourne Park.
Six-time champion Roger Federer survived a late-night Swiss semi-final thriller against Stanislas Wawrinka on Saturday to set up an ATP World Tour Finals showdown against Novak Djokovic.
Rafael Nadal overcame a temporary blip on his way to victory at the ATP Cup on Saturday
Images from Day 10 of the 2021 US Open in New York on Thursday.
Fourth seed Rafael Nadal showed he is healthy and ready to challenge for a third US Open title as he rolled into the last 16 at Flushing Meadows on Friday with a fist-pumping 6-1, 6-4, 6-2 win over Russian Andrey Kuznetsov.
A long year has taken its toll on some of the world's best tennis players but the relentless Novak Djokovic gives no indication that he is about to slacken the pace as he heads to the season-ending ATP World Tour finals in London.
'Just six months ago, you would've been labelled mad for even suggesting the possibility of Djokovic relinquishing the top spot in men's tennis.'
Images from Day 1 of the Wimbledon tennis championships in London, on Monday.
'We wanted to protect every player and fan after learning that Dimitrov tested positive. It was a charity event and all we wanted was to play tennis and give the fans a good show'
Andy Murray believes the best years of his career could still be ahead after confirming his status as world number one by beating Novak Djokovic to claim the ATP Tour Finals crown on Sunday. Murray, 29, became the oldest man since 1974 to reach the top of the rankings for the first time last month and the way he dominated the final months of the season, winning five titles and 24 matches in a row, suggests he could be right.
Eleven years after their first meeting in the Australian Open final, Novak Djokovic and Jo-Wilfried Tsonga will take a trip down memory lane on Thursday to renew their rivalry in the second round in Melbourne.
Images from Day 8 of the 2021 US Open in New York on Monday.
Borna Coric ended Roger Federer's 20-match winning streak on grass, beating him 7-6(6), 3-6, 6-2 in the Halle Open final on Sunday while also bringing to a halt the Swiss maestro's reign as World No 1.
Rafael Nadal crowned his brilliant year by defeating World No 1 Novak Djokovic 6-2, 3-6, 6-4, 6-1 to win the US Open men's singles title at Arthur Ashe Stadium on Monday.
Novak Djokovic overcame a battling Marin Cilic 6-4, 3-6, 6-3 to reach his sixth Cincinnati Masters final on Saturday while Roger Federer enjoyed a less-taxing route to the title match after his semi-final opponent David Goffin retired with a shoulder injury.
Photos from the matches played at the Miami Open on Tuesday
Defending champion and world number one Andy Murray was swept aside by home favourite Fabio Fognini at the Italian Open on Tuesday, being completely outplayed in a 6-2, 6-4 defeat.