Djokovic, Coric, Grigor Dimitrov and Viktor Troicki all tested positive for COVID-19 after playing in the event in Serbia and Croatia, which drew big crowds and saw the players pose for pictures together.
Marin Cilic can now secure Croatia's place in Friday's semi-final against Australia with a victory over Pablo Carreno Busta in the day's second singles match.
Coric was quick out of the blocks at the Qi Zhong Stadium as he broke in the opening game against the top seed and only lost five points on serve to clinch the first set in 34 minutes.
Croatian Borna Coric saved six match points as he rallied from 5-1 down in the fourth set to stun Stefanos Tsitsipas 6-7(2), 6-4, 4-6, 7-5, 7-6(4) and send the fourth seed tumbling out of the US Open in the third round on Friday.
Coric's positive test follows that of Grigor Dimitrov, who said on Sunday he had contracted the novel coronavirus.
German fifth seed Alexander Zverev survived a stern test of nerve to reach his second Grand Slam semi-final this year after outclassing Croatian Borna Coric at the US Open on Tuesday.
Dhakshineswar, who is in US College circuit, could not qualify for the singles main draw, falling in the second round of the qualifying event 3-6, 4-6 to American fourth seed Learner Tien.
Call it sacrifice or compromise but Coric is ditching the sinful tiramisu.
Inspired Garcia goes from Cincinnati qualifier to champion
Defending champion Jannik Sinner swept past Felix Auger-Aliassime 6-0, 6-2 on Thursday to reach the Cincinnati Open semi-finals, the world number one extending his hardcourt winning streak to 25 matches.
Croatia became the first team to win the mixed-gender team competition following the tournament's return to the tennis calendar after a four-year absence.
Borna Coric and Marin Cilic put Croatia in complete control of the Davis Cup final on Friday, leaving hosts and defending champions France facing what looks like mission impossible.
The 14-times Grand Slam champion will surpass Roger Federer as world number two when the next edition of the ATP rankings are released on Monday.
The 21-year-old Coric came from two sets to one down to defeat the 20-year-old debutant Tiafoe 6-7(0), 6-1, 6-7(11), 6-1, 6-3 and finally subdue a remarkable fightback from the Americans, who had earlier levelled the tie 2-2 from two down.
Indian tennis star Sumit Nagal continued his fine form as he entered the quarterfinal of the ongoing Perugia Challenger.
Stan Wawrinka will begin his title defense at the Chennai Open facing off against Croatian teenager Borna Coric.
Croatia's Borna Coric and Donna Vekic outlasted Spain's Carlos Alcaraz and Rebeka Masarova 1-6, 6-4 (14-12) in their Hopman Cup mixed doubles rubber on Saturday to secure a 2-1 victory that earned them a spot in the final against Switzerland.
Kyrgios shot back at Coric, saying he "should care" about his comments.
Roger Federer trounced Croatian teenager Borna Coric 6-2, 6-1 at the Dubai Championships on Friday to set up a potential final showdown with world number one Novak Djokovic.
Andy Murray demolished Croatian teenager Borna Coric 6-1, 6-2 in the second round of the Paris Masters on Wednesday to set up a Davis Cup-flavoured clash with Belgium's David Goffin.
Korean qualifier Hyeon Chung produced the first upset of the ATP Chennai Open by ousting last year's finalist Borna Coric with a straight-set win in the opening round of the $505730 hard court event in Chennai on Monday.
Earlier in the day, Croatia's Borna Coric said he has tested positive for coronavirus. He became the second player to test positive for COVID-19 after Bulgaria's Grigor Dimitrov.
The Australian was warned for bad language and docked a point for unsportsmanlike conduct after throwing his racquet into the stands during Friday's 6-3, 6-4 defeat by Borna Coric in the Murray River Open at Melbourne Park.
France's Benoit Paire has tested positive for COVID-19 and pulled out of the US Open starting on Monday, French sports daily reported on Sunday. Paire, seeded 17th at the Grand Slam event, had been scheduled to play Poland's Kamil Majchrzak in the first round at Flushing Meadows on Tuesday.
Teeanger Borna Coric completed an unlikely comeback for Croatia as the small Balkan nation beat the United States 3-2 in a Davis Cup quarter-final in Oregon on Sunday.
Petra Kvitova overcame a sluggish start and 10 double faults to beat Madison Keys 6-7(6), 6-4, 6-3 on Saturday and advance to the final of the Cincinnati Open, where she will face Caroline Garcia, the first qualifier to reach the final of a WTA 1000 tournament.
The tournaments involve eight players each, divided into two pools of four on a round-robin basis. Sets have been slashed to best-of-seven games.
Croatia and France were tied at 1-1 after Friday's singles in their Davis Cup semi-final clash in Zadar after Richard Gasquet and Marin Cilic both won their matches.
Manchester United midfielder Nemanja Matic has defended his Serbian compatriot Novak Djokovic for hosting the ill-fated Adria Tour where a number of players, including the world number one, tested positive for COVID-19. Djokovic was criticised for hosting the tennis tournament amid a pandemic after his coach Goran Ivanisevic and players Grigor Dimitrov, Borna Coric and Viktor Troicki returned positive tests over the two legs in Serbia and Croatia.
The 21-year-old Japanese was scheduled to face sixth seed Kiki Bertens after coming through two matches on Thursday in the rain-affected tournament but said she was forced to withdraw due to pain and swelling at the base of her thumb.
Last week the men's ATP and the WTA, which runs women's events, issued revised calendars for the resumption of the circuit from August while organisers of the US Open said the Grand Slam will be staged without fans as scheduled from August 31 to September 13 in New York.
Andy Murray's February torment deepened on Thursday after he lost 6-1, 6-3 to 18-year-old Croatian tyro Borna Coric in the quarter-finals of the Dubai Championships.
With 'nothing to lose', Kuznetsov senses upset over vulnerable Murray
'I can only see criticism lately and much of it is malicious'
Djokovic's father blamed the cancellation of the tour on Dimitrov. There is nothing to suggest that Dimitrov spread the virus to others.
The Adria Tour tournament, was the brainchild of World No 1 Novak Djokovic, who, along with his wife also tested positive for COVID-19 after the Adria Tour's second leg in Croatia.
The 24-year-old then pounced with Lehecka serving at 4-5, reaching match point with a searing backhand pass and wrapping up victory as his opponent netted a backhand.
Australia beat Croatia 2-1 on Friday in Malaga, Spain, to reach the Davis Cup final for the first time in 19 years and will next face either Canada or Italy.
Carlos Alcaraz stayed on course for his fourth title of 2023 by powering into the semi-finals of the Madrid Open.
Coric, who had failed to win a match in his last two appearances in Beijing and Shenzhen, saved two break points at 3-3 in the second set and clinched the first four games of the decider to record his 32nd match win of the season.
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