The seventh-seeded Bulgarian advanced to his eighth ATP World Tour Masters 1000 quarter-final with a 6-3, 7-5 victory over Del Potro, who struggled with the intense heat in the closing stages of the one hour, 39 minute match.
Djokovic is clubbed with Federer, Juan Martin Del Potro, David Goffin and Alexander Zverev.
The 'Big Four' of men's tennis have made it into the second week of Wimbledon unscathed and largely untroubled while the women's draw remains wide open, but "Manic Monday" could offer major clues as to the destination of this year's titles.
Alexander Zverev is a potential superstar who bears comparison not only with his fellow German Boris Becker but also the great American singer Bob Dylan.
Former world number one Novak Djokovic showed signs of a return to form with an impressive 7-5, 6-4 victory over Japan's Kei Nishikori in the opening round of the Madrid Open on Monday.
Roger Federer advanced to his 12th Australian Open semi-final on Tuesday with an efficient 7-6(4), 6-2, 6-4 victory over sixth seed Tomas Berdych.
Images from Day 9 of the 2020 French Open at Roland Garros, in Paris, on Monday.
Milos Raonic overcame third seed Grigor Dimitrov 7-5, 3-6, 6-3 to reach the third round at the Madrid Open on Tuesday and set up an all-Canadian clash with teenager Denis Shapovalov.
Roger Federer moved to within one win of his 1,000 career victory when he crushed Bulgaria's Grigor Dimitrov on Saturday to reach the final of the Brisbane International.
Ana Konjuh was not a year old when Serena Williams played her first US Open match but both will be in the Arthur Ashe Stadium spotlight on Wednesday, with four gripping quarter-finals to take centre stage at the year's final Grand Slam.
India's Rohan Bopanna and his Romanian partner Florin Mergea entered the Sydney International final after a straight sets win over Thomaz Bellucci and Leonardo Mayer, on Friday.
Swiss second seed Stanislas Wawrinka won a hard-hitting battle with American Jack Sock on Thursday to reach the quarter-finals at the Rogers Cup with a 7-6(3), 6-2 triumph.
Second seed Roger Federer powered to a 6-4, 6-3, 6-2 win over Roberto Bautista on Tuesday, charging into the quarter-finals of the US Open for the 10th time in 11 years.
World number ones Serena Williams, aiming to complete the first calendar-year Grand Slam in 27 years, and Novak Djokovic have been named the top seeds for the US Open championships starting on Monday in New York.
Andy Murray and Rafael Nadal were winners but six seeds were beaten in a day of upsets in the second round at the Rogers Cup in Montreal on Thursday.
Roger Federer overcame a sluggish start to defeat Filip Krajinovic 7-5, 6-3 and Kevin Anderson's booming serve proved too much for Joao Sousa as the big names advanced to the fourth round of the Miami Open on Monday.
World No 1 Novak Djokovic laid down an early French Open marker when he reached the Monte Carlos Masters final.
Images from Day 4 of the Australian Open in Melbourne on Thursday.
Roger Federer is in love with tennis even after nearly two decades but may not be that keen to follow his children if they ever turned professional, the Swiss maestro said after storming into the third round of the Australian Open on Wednesday.
Roger Federer took 55 minutes to dispel all injury doubts with a 6-2, 6-1 routing of unheralded German Tobias Kamke in the second round of the Brisbane International on Thursday. Media speculations swirled around the fitness of the world number three less than two weeks before he launches his bid for a fifth Australian Open title and the Swiss maestro dismissed them by dropping only three games in a lop-sided contest. "I'm going to do my best to stay injury free and give myself a chance to win another grand slam," Federer said after setting up a quarter-final against Grigor Dimitrov.
Here are some of the best moments from the 2019 Australian Open.
The 33-year-old Swiss maestro produced a masterclass of shot-making as he thrashed Australian wildcard James Duckworth 6-0, 6-1 to charge into the semi-finals of the Australian Open warm-up event.
Change might be afoot though, according to American great John McEnroe
For a seven-time champion who is a month shy of his 35th birthday, and is known to have a dodgy back, fate could not have dealt Roger Federer a better hand this week as he became the first, and so far only, man to reach the Wimbledon fourth round.
World No 1 Novak Djokovic began his Paris Masters title defence with a routine 6-3, 6-4 win over German Philipp Kohlschreiber in the second round on Tuesday.
Federer is safely into the second week at the All England Club for the 15th time.
On the men's side, the fields have already been divided into two ATP 250 tournaments.
The latest tennis rankings have been announced by the ATP and WTA
It will be the earliest meeting between the two since their first professional match in the second round of the 1998 Australian Open.
Roger Federer added yet another record to his vast collection when he guaranteed becoming the oldest ATP world number one by beating Dutchman Robin Haase 4-6, 6-1, 6-1 to reach the semi-finals in Rotterdam on Friday.
Defending champion Djokovic fired his 15th ace on match point to defeat Querrey but his serve had been an issue earlier in their second-round encounter.
Edmund is no flash Harry, on or off the court
Nick Kyrgios toppled his childhood idol Jo-Wilfried Tsonga to bury his Rod Laver Arena hoodoo and reach the fourth round of his home Australian Open on Friday.
I'd love to win Wimbledon and I think it's possible, says Roger Federer.
Andy Murray trounced Marinko Matosevic 6-1, 6-3, 6-2 to reach the third round of the Australian Open on Wednesday but insisted there was no edge to the match after the Australian's criticism of his decision to hire Amelie Mauresmo as coach.
Sixth seed Andy Murray may feel the most aggrieved of the top contenders in the men's draw.
Rafael Nadal's hopes of a 15th Grand Slam title were crushed by an inspired Roger Federer in the Australian Open final on Sunday but the rejuvenated Spaniard was already rubbing his hands together with the prospect of a 'special' season on clay.
Rafael Nadal's path to his Australian Open semi-final against Grigor Dimitrov on Friday has taught the 30-year-old Spaniard one thing -- he's still got it.
IMAGES from the Australian Open matches played on Friday.
With a crop of talented young players knocking on the door of the exclusive men's Grand Slam club, the 'Big Four' hegemony over the game's top tournaments may be coming to a close.
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