Adelaide International: Unseeded American Danielle Collins knocks out World No 1 Ashleigh Barty in straight sets
Collins seized on some poor serving from the world number one to claim a convincing 6-3, 6-4 win in just 65 minutes.
Top-ranked Ash Barty, who lost in the Australian Open quarterfinals, is the Adelaide defending champion.
Barty is on track to become the first Australian champion since Chris O'Neil in 1978 and will be hot favourite when she plays 25th seed Karolina Muchova in the quarter-finals
Australian Open 2021: Ash Barty moves into quarters after beating Rogers; Rafael Nadal defeats Fognini
Jessica Pegula defeated Elina Svitolina to register her first victory over a Top 10 opponent. Among men, Nadal and Medvedev advanced to the quarter-finals.
World No 1 Ashleigh Barty said it was "very strange" to play behind closed doors, a day after more than 22,000 fans visited Melbourne Park, as the five-day, state-wide lockdown went into force.
The lines for beer on Day 1 at the Australian Open were noticeably thinner than usual, and the lawn chairs set up in front of the giant television screen in Garden Square were far emptier.
'When you play in front of an empty big stadium, it just feels very strange,' said Novak Djokovic
Australian Open 2021 women's singles preview: Ashleigh Barty gets decent draw; Naomi Osaka gunning for second AO title
Ahead of the Australian Open's long-awaited return, Firstpost takes a look at the women's singles draw and attempts to determine the potential outcome of all four quarters
Ashleigh Barty announced her withdrawal hours after French Open organizers said spectators would be allowed at the tournament despite a growing number of coronavirus cases in the country.
Should he continue to test positive into next week, World No 31 Nishikori would be in jeopardy of missing the start of the US Open.
Kuznetsova wrote Monday on Instagram that she was pulling out of the US Open and the tournament preceding it at the same site in New York.
'A decision I never wanted to take': Defending champion Rafael Nadal to skip US Open due to COVID-19
Nadal's plan to skip the US Open came shortly after the Madrid Open, scheduled for September, was cancelled because of the pandemic.
Serena Williams, Rafael Nadal among big names in initial entry lists for Cincinnati; top-ranked Ashleigh Barty excluded
However, just because a player is on Wednesday’s lists does not mean she or he necessarily will compete at the New York-hosted Cincinnati event.
Wuhan Open 2020 offers hope for all; would be tough to convince players to participate, says organiser
Wuhan has accounted for the majority of China’s coronavirus deaths to date and the city was subject to one of the strictest lockdowns in the world for 76 days.
US Open 2020: World No 1 Simona Halep 'highly unlikely' to feature in Grand Slam with 'incredibly difficult' protocols in place
The United States Tennis Association (USTA) received the green light to hold their marquee tournament in New York as scheduled from 31 August - 13 September without fans.
US Open 2020 to be held on scheduled dates without fans after New York Governor Andrew Cuomo gives go ahead
Even with the go-ahead from the state, one significant question remains for the US Open: Which players actually will participate?
Kyrgios, who has been in lockdown in Australia since the pandemic brought a halt to the ATP Tour, appeared more concerned about having to undergo 14 days of self-isolation upon his return home from Flushing Meadows.
Qatar Open: Petra Kvitova overcomes tenacious Ash Barty to set up title clash against Aryna Sabalenka in Doha
Petra Kvitova edged a seesaw battle with Australian world No 1 Ash Barty 6-4, 2-6, 6-4 at the Qatar Open on Friday to set up a title clash against Aryna Sabalenka in Doha.
Qatar Open: Garbine Muguruza sets up quarter-finals against Ash Barty; Karolina Pliskova loses to rising star Ons Jabeur
Former No 1 Garbiñe Muguruza beat Ukrainian teenager Dayana Yastremska 6-2, 6-4 Wednesday to reach the quarter-finals of the Qatar Open.
Australian Open 2020: Confident Sofia Kenin keen to take the fight to Garbine Muguruza in her first Grand Slam final
Kenin has shown at Melbourne Park she has the game to beat the biggest names, building on a stellar 2019 when she won all three of her singles titles to reach a career-high world ranking of 12.