Japan's Nishikori was the first man representing an Asian country to break through to a Grand Slam final at the 2014 tournament before Marin Cilic stopped him in the title match.
Tennis World No. 1 Novak Djokovic spent Orthodox Christmas in Australian immigration detention on Friday as his lawyers fought a government decision to remove him from the country that could scupper his shot at a record-breaking 21st Grand Slam.
Rafael Nadal toppled big-serving American Reilly Opelka to remain perfect on the year while unseeded Serbian Miomir Kecmanovic stunned world number six Matteo Berrettini.
The five-day lockdown, ordered after a new COVID-19 outbreak at a hotel, was due to start at midnight.
Kyrgios did not face a single break point and hit 18 aces, including two to close out the final.
Indian tennis stars enjoyed a successful start in the US Open as veteran Leander Paes entered the mixed doubles second round while Rohan Bopanna also won his opening tie in the men's doubles event in New York.
IMAGES from the Australian Open matches played on Friday.
Rafael Nadal is tied with Roger Federer as the player with the most men's singles majors and the Spaniard can now overtake his great rival who has skipped the Australian Open.
Rafael Nadal returns to his favourite tournament, albeit not his preferred court, to begin pursuit of a record-extending 10th French Open title on Monday against Frenchman Benoit Paire.
Andy Murray has been the standout performer on clay for the past 12 months but world number one Novak Djokovic will be favourite to complete his set of grand slams at this year's French Open. Murray, according to the ATP Performance Zone stats, has won 85 percent of his matches on the red dust this year and last, more than any other player. Having been at 70 percent for the first 10 years of his career, the improvement demonstrates just how at home the Briton now feels on a surface he once treated with suspicion. His victory over Djokovic in Sunday's Italian Open final may have been aided by his opponent's energy levels being drained after a gruelling semi-final win over Kei Nishikori the night before. But it also was a timely statement of intent from the world number two, who recently split with coach Amelie Mauresmo.
The Citi Open in Washington, which was scheduled to restart the men's ATP Tour after the COVID-19 shutdown, has been cancelled for 2020, organisers announced on Tuesday. The tournament was set to begin on August 14 and serve as a build-up for the US Open but the organisers said concerns about travel restrictions and recent trends in the coronavirus outbreak had led to the decision to scrap the event.
Bulgarian Grigor Dimitrov kept cool in the Rod Laver Arena maelstrom to knock home favourite Nick Kyrgios out of the Australian Open in a fourth-round thriller on Sunday.
Nick Kyrgios has had more than his fair share of run-ins with umpires over his career
Serena Williams must navigate a heavily American quarter of the draw including sister Venus to complete a calendar sweep of the four Grand Slams, while two sensational quarter-finals loom on the men's side after Thursday's U.S. Open draw.
India's tennis stars enjoyed comfortable wins in the Australian Open on Thursday as Sania Mirza eased into the second round with partner Martina Hingis while Rohan Bopanna also registered a straight sets victory in the men's doubles first round.
Images from Day 3 of the Wimbledon tennis championships played in London, on Wednesday.
Federer beat Kyrgios for the third time in as many editions of the competition to take Europe closer to the 13-point victory target
Australian 24-time Grand Slam winner Margaret Court said on radio on Wednesday that tennis was 'full of lesbians', courting controversy again just a week after expressing her opposition to same-sex marriage.
World number one Rafael Nadal won a battle of attrition against fellow left-hander Yoshihito Nishioka of Japan 7-6(4), 6-4 to seal Spain's spot in the final eight of the inaugural ATP Cup in Perth on Wednesday. Meanwhile his long-time rival, world number two Novak Djokovic, had an easier outing in Brisbane, strolling past Chile's Cristian Garin 6-3, 6-3 to stay undefeated in the new year.
Reigning champions Novak Djokovic and Serena Williams have been named top seeds for the Australian Open starting on Monday.
Simona Halep will take over as the new number one in the WTA world rankings after progressing to the China Open final with a dominant 6-2 6-4 victory over Latvia's Jelena Ostapenko in Beijing on Saturday.
The Swedish chair umpire who gave a pep talk to Australian Nick Kyrgios during a US Open match this year has been suspended without pay for two weeks, the ATP Tour said on Tuesday.
Cilic marches past Querrey into Queen's semis
'We are notifying ticket holders, players and staff that there will be no fans onsite at the AO for five days'.
Nadal meets the 'new Nick' Kyrgios in fourth-round blockbuster
Vishnu Vardhan won his second Challenger level title of the season with Japanese partner Toshihide Matsui but four other Indians, including Leander Paes, tumbled out of various ATP events across the globe.
Nadal is bidding for his second title in his 15th appearance at Melbourne Park
'Irresponsible' Djokovic panned for Adria Tour misadventure.
Chris Evert - along with John McEnroe - told reporters that air quality should be paramount in tournament organisers' minds.
It was the best match of Wimbledon's opening week as, amongst the expected histrionics, both men hit the heights with some relentlessly powerful and accurate serving in particular.
Leander Paes and Scott Lipsky progressed to the second round of the ATP Geneva Open after battling past Tommy Robredo and David Marrero, in Geneva, on Tuesday.
Tomic slams 'disrespectful' Tennis Australia.
The Spaniard, who has never gone beyond the quarter-finals in a grand slam, grew in confidence in the second set, however, with the backing of the home support on the Manolo Santana court and saved two break points before forcing a decider.
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.
Goffin's 6-3, 6-3, 6-2 triumph in front of a boisterous home crowd gave Belgium a 3-1 lead and sent them into a home semi-final against Australia who also wrapped up victory over the United States thanks to Nick Kyrgios's defeat of Sam Querrey.
Second seed Gael Monfils edged past Croatia's Ivo Karlovic 7-6(6), 7-6(6) and Marin Cilic ousted Argentine Juan Monaco 7-5, 6-1 to progress to the Japan Open semi-finals in Tokyo on Friday.
Rediff.com takes a look at some interesting highlights of the tournament.
Reaction to Novak Djokovic's disqualification from the US Open for striking a line judge with a ball during his match against Pablo Carreno Busta on Sunday.
Unseeded Novak Djokovic was given some trouble by Jeremy Chardy in the opening set but prevailed 7-6(5), 6-4 to take his record over the Frenchman to 11-0 and 26-0 in sets.
Roger Federer stared down defeat and saved two match points before knocking Tomas Berdych out of the Miami Open on Thursday with a 6-2, 3-6, 7-6(6) victory in their thrilling quarter-final.