Naomi Osaka gave Jennifer Brady a lesson in Grand Slam tennis as she cruised to a 6-4 6-3 win to claim her second Australian Open title on Saturday and cement her standing as the new queen of the women's game.

Russia's Daniil Medvedev overpowered Stefanos Tsitsipas to make his first Australian Open final Friday, where he will bid to stop world number one Novak Djokovic from clinching an unprecedented ninth title.

Elise Mertens and Aryna Sabalenka beat Czech pair Barbora Krejcikova and Katerina Siniakova 6-2 6-3 to win the Australian Open women's doubles title on Friday for their second Grand Slam trophy together.

Defending champion Novak Djokovic declared himself fighting fit for the Australian Open final after ending the incredible run of Russian qualifier Aslan Karatsev with his "best match" of the tournament on Thursday.

Naomi Osaka emphatically ended Serena Williams's latest bid for a record-equalling 24th Grand Slam crown with a straight-sets demolition in the Australian Open semi-finals Thursday.

Rafa Nadal's bid for a record 21st Grand Slam title came crashing to a halt at the Australian Open on Wednesday as Stefanos Tsitsipas rose up to topple the Spaniard 3-6 2-6 7-6(4) 6-4 7-5 and reach the semi-finals..

Reigning champion Novak Djokovic overcame several dips in form to beat Alexander Zverev 6-7(6) 6-2 6-4 7-6(6) and book his place in the Australian Open semi-finals on Tuesday.

An unstoppable Serena Williams reached a 40th Grand Slam semi-final Tuesday, overpowering second seed Simona Halep to book an Australian Open last-four showdown with Naomi Osaka.

Australia's second-largest city of Melbourne went from welcoming thousands of fans for its Grand Slam tennis tournament to deserted city streets overnight, as millions began a five-day coronavirus lockdown.

Rafa Nadal dispelled any remaining doubts over his fitness with a commanding 6-1 6-4 6-2 win against American qualifier Michael Mmoh on Thursday to march into the Australian Open third round and stay on track for a record 21st Grand Slam title.

Novak Djokovic's aura of invincibility at Rod Laver Arena wavered under the pressure of Frances Tiafoe on Wednesday but the Serbian rose to the challenge to claim a tough 6-3 6-7(3) 7-6(2) 6-3 win and reach the third round of the Australian Open.

Rafa Nadal defied his gloomy injury prognosis and complete lack of match practice to crush Laslo Djere 6-3 6-4 6-1 on Tuesday and reach the Australian Open second round as he launched his bid for a record 21st Grand Slam title.

Denis Shapovalov claims he's got the smallest bladder on tour and the Canadian was not impressed when an umpire at the Australian Open denied his request for a toilet break.

The days of tennis players arguing whether balls are in or out could be coming to a close, after the smooth introduction of electronic line judging at the Australian Open on Monday.

Tennis fans wearing masks filtered into Melbourne Park on Monday for the start of the Australian Open, this year's first Grand Slam event, as the host city recorded one new locally transmitted case of the novel coronavirus.

World number one Novak Djokovic found playing without crowds last season strange and he can’t wait to wow the fans in the stands at his 17th Australian Open.

Rafa Nadal brushed aside questions about the Australian Open quarantine on Sunday and said it was time to get down to the business of playing tennis and entertaining fans around the world.

Serena Williams took her daughter to the zoo and Novak Djokovic walked barefoot in a park as the stars of tennis emerged from a fortnight of quarantine ahead of the coronavirus-delayed Australian Open Friday.

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.

Andy Murray's participation in the Australian Open is in doubt after it was announced on Thursday he had tested positive for coronavirus.