'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 the Miami Masters played in Key Biscayne, Florida on Tuesday
A razor-sharp Roger Federer got back to winning ways at the ATP World Tour Finals with a 6-4, 6-3 defeat of Frenchman Richard Gasquet on Thursday to keep his last-four chances alive.
Top seed Novak Djokovic launched his Shanghai Open title defence in fine style, breezing past Spain's Marcel Granollers 6-2, 6-0 on Wednesday. Later Roger Federer, playing his first singles match since a fourth-round exit at the US Open, made a brisk return to winning ways, beating Andreas Seppi 6-4, 6-3.
Kuznetsova unable to defend Washington title over 'visa issues'
Marin Cilic overcame Federico Delbonis 6-3, 7-5, 3-6, 1-6, 6-2 after a titanic tussle in the opening singles rubber to give hosts Croatia a 1-0 lead over Argentina in the Davis Cup final on Friday.
In the last eight weeks Novak Djokovic has resembled the Grand Slam machine that held all four major titles at the same time in 2016, wining three of his last four events including Wimbledon and US Open.
PHOTOS from day two of the Wimbledon championships at the All England Lawn Tennis and Croquet Club in London on Tuesday.
Canadian teenager Denis Shapovalov believes his first season on the ATP Tour has helped him grow into a better player and he is relishing the challenges ahead.
There is no let-up for Roger Federer as he prepares for his 12th consecutive appearance at the ATP's season-ending extravaganza.
Serena Williams returns to the Arthur Ashe Stadium on Sunday
Roger Federer took a big step towards securing his endangered place in the ATP World Tour Finals by overcoming rising Canadian talent Vasek Pospisil 6-3, 6-7(3), 7-5 in the Basel Open semi-finals on Saturday.
Serena Williams faces her first seeded opponent at the French Open on Thursday and will hope to use her booming serve to beat Australian Ashleigh Barty in the second round.
Former world number one Serena Williams returns to Grand Slam action for the first time in over 15 months, when she goes up against Czech Kristyna Pliskova in the French Open first round.
IMAGES from Day 7 of the US Open on Sunday
Since his June trek with his wife up Mont Sainte-Victoire, the mountain that famously also served as an inspiration for Paul Cezanne, the 31-year-old has added a pair of Grand Slam titles to his resume.
World number one Ash Barty was shocked in the first round of the women's singles at the Tokyo Olympics on Sunday. The Australian was beaten by Sara Sorribes Tormo 6-4, 6-3.
Rafael Nadal continued to scythe his way through the Shanghai Masters on Thursday, reaching the quarter-finals with a 6-3, 6-1 thrashing of temperamental Italian Fabio Fognini.
World number two Novak Djokovic expects Stanislas Wawrinka and Andy Murray to lift their game at the French Open despite failing to make an impact so far in the clay court season.
Here is a timeline of Djokovic's decline since the last of his 12 Grand Slam titles.
'Not only are four of the top five fathers, but Federer famously injured a knee, weakened by years of twisting and turning on tennis courts, early this year while giving his elder pair of twins a bath.'
Andy Murray suffered his first defeat in nearly three months on Thursday when he was beaten by Latvia's Ernests Gulbis in the third round of the Rogers Cup. Playing just his second match since winning Wimbledon, Murray fell 6-4, 6-3 in less than an hour and a half in one of the key lead-up events to the US Open.
Lucky loser Taro Daniel will replace Nadal in the second round against Jo-Wilfried Tsonga.
Top seed Carlos Alcaraz dominated Gael Monfils 6-2 6-4 and fourth seed Alexander Zverev escaped a tight first set en route to a 7-6(4) 6-3 win over Christopher Eubanks to reach the last 16 at the Miami Open on Monday.
His great rival Roger Federer had already maintained his regal progress earlier on the showcourt and Serena Williams then followed with another thumping win.
Rafael Nadal has pulled out of next week's ATP Tour Finals in London due to injury, so Novak Djokovic will end the year as world number one having returned to the top of the rankings on Monday.
Roger Federer cruised to a 6-4, 6-4 win over Peter Gojowczyk in his first appearance since losing in the Wimbledon quarter-finals.
Roger Federer ended Grigor Dimitrov's seven-match winning streak and showed the Bulgarian he has some way to go to live up to his 'Baby Federer' tag with a 6-3 7-6 (2) quarter-final victory at the Basel Open on Friday.
Rafael Nadal gave Russian teenager Andrey Rublev a tennis lesson on Wednesday, racing into the semi-finals of the US Open with a ruthless 6-1, 6-2, 6-2 win that cleared the path for a possible showdown with rival Roger Federer.
IMAGES from Day 6 at Wimbledon on Saturday.
Fourteen-time Grand Slam champion Rafael Nadal has entered the quarter-finals of the ATP Acapulco tournament with a comprehensive straight-sets victory over Italy's Paolo Lorenzi.
Japan's Kei Nishikori, who will arrive at Roland Garros without an ATP title for more than two years and desperate to prove that his career has not already peaked.
With the Australian Open currently on, defending champion Novak Djokovic has once again been dubbed as a favourite to retain the title, and former world No. 17 Bernard Tomic of Australia firmly believes there will be no one to challenge the great Serbian.
List of US Open men's singles champions since the Open Era began in 1968:
Six-time champion Novak Djokovic's hopes of turning around his season at the Miami Open ended in the second round when he was defeated 6-3, 6-4 by Frenchman Benoit Paire.
World number one Rafael Nadal will face compatriot David Ferrer at next week's ATP World Tour Finals in London, with last year's champion Novak Djokovic and runner-up Roger Federer drawn in the second group on Saturday.
News of all that's transpired on and off the tennis courts.
Roger Federer, not known for serious slip-ups in his flowing run to a record 17 grand slam singles titles, has come clean about the left knee injury that sidelined him for nearly two months.
Teenager Taylor Fritz earned the chance to face his hero Roger Federer after the American defeated an unranked French qualifier on Tuesday to reach the second round in Stuttgart. Federer will be playing his first match in nearly a month after recovering from back pain and skipping the French Open, as he ramps up his preparations for Wimbledon. Number 65 Fritz has had time on court with the Swiss legend -- a Wimbledon training session a year ago - but booked his place into the match of his life with a 3-6 7-6 (8/6) 6-1 win over Fabrice Martin on the grass at the Weissenhof Club. Fritz, 18, said he will not worry with nerves when he faces one of the best players on the planet. "I have nothing to lose, there is no pressure on me, I don't think there will be any nerves." The teenager said he had watched and admired Federer as a boy aged 11.
This time last year, Federer was the pundits' pick to claim a third Grand Slam title of 2017 in New York, after roaring back from a season decimated by injury to win the Australian Open and Wimbledon.