US Open Tournament Referee Soeren Friemel said there was "no other option" but to disqualify world number one Novak Djokovic on Sunday after he struck a line judge with a ball.
Eight-time Wimbledon champion Roger Federer, who turns 40 this year, takes on Frenchman Adrian Mannarino in round one.
Wimbledon finalist Nick Kyrgios is one match away from a first Grand Slam title but his brother, Christos, said on Sunday the Australian is already a champion in his family's eyes after winning an off-court battle with his inner demons.
Novak Djokovic has suffered more than his fair share of heartache against Rafael Nadal at the French Open but Sunday's final offers him a chance to dethrone the claycourt king.
Scorching heat halted outdoor matches and sent fans scurrying for shade at the Australian Open on Tuesday.
Tennis titans Rafael Nadal and Novak Djokovic met with Thai Prime Minister Prayuth Chan-ocha on Friday and visited the site of a deadly Bangkok bomb blast.
Novak Djokovic will begin his Australian Open title defence against Frenchman Jeremy Chardy, while reigning women's champion Sofia Kenin meets wild card Maddison Inglis, following the draw for the year's first Grand Slam on Friday.
Maria Sharapova enjoyed a glittering career that saw her complete a career Grand Slam, win 36 WTA titles,
This year's Australian Open will be allowed to admit up to 30,000 fans a day, around 50% of usual capacity, amid the COVID-19 pandemic.
We spotted some celebs from the world of Hollywood, cricket and comedy enjoying some tennis action and here we give a glimpse of them...
'I'm not vaccinated and I'm not planning to get vaccinated so the only good news I can have is them removing the mandated green vaccine card'
It was only 13-time champion Rafael Nadal's third defeat here since his debut in 2005 and the first time in 115 best-of-five-set matches on clay that he had lost after taking the opening set.
Novak Djokovic decided to travel to New York for the US Open amid the COVID-19 pandemic because the 17-time Grand Slam champion did not want to pass up on the opportunity to close in on Roger Federer's record tally of 20.
Novak Djokovic has parted company with coach Radek Stepanek days after the departure of head coach Andre Agassi from his team, the former world number one announced on Wednesday.
Indian Wells champions Carlos Alcaraz and Elena Rybakina stayed on course to complete the 'Sunshine Double' at the Miami Open.
World number one Novak Djokovic saved three match points to beat France's Gael Monfils 2-6, 7-6(8), 6-1 on Friday as he set up a final showdown at the Dubai Open with Greek second seed Stefanos Tsitsipas. Djokovic is yet to lose this year and the Australian Open champion extended his unbeaten run in 2020 to 17 matches with what was also his 17th win over Monfils.
Novak Djokovic's run of 17 successive Tour finals came to a grinding halt when he was forced out of the Dubai Open on Thursday.
Nick Kyrgios has likened Novak Djokovic to NBA player LeBron James in his influence both on and off the court but says he had a duty to call out the world number one when he "lost his way" during the COVID-19 pandemic.
Novak Djokovic has sealed the year-end men's world number one tennis ranking for the sixth time to go level with childhood hero Pete Sampras after closest rival Rafael Nadal opted against playing in the ATP Tour event in Sofia next week.
Canada's Bianca Andreescu upset Greek seventh seed Maria Sakkari to reach the last 32, while Japan's Taro Daniel crushed world number 15 Alexander Zverev.
Rafael Nadal confirmed he will miss this year's French Open as he is yet to recover from injury.
Rafael Nadal said on Saturday "too many questions" still needed to be answered concerning Novak Djokovic's bid to play at the Australian Open, while other leading players lamented how the saga had overshadowed the year's first Grand Slam.
'Almost three hours. It's midnight now. Credit to John for putting up a great battle'
Djokovic practised his serves and returns with his entourage on an empty court at Melbourne Park
Djokovic did not drop a set en route to the final in Rome