Australian Open 2021 day one: Thiem leads men's seeds' charge, Osaka and Serena Williams into second round – live!

• Updates as the first tennis grand slam of the year begins
• Angelique Kerber feels effects of quarantine in early exit
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7.16am GMT

Gael Monfils is also feeling the enduring effects of Covid, breaking down during his press conference after his own shock loss to unseeded Finn Emil Ruusuvuori. The world No 10 Frenchman ended up in tears describing his form slump, having not won a match since tennis' return from the pandemic-enforced hiatus.

I would like to get out of this nightmare but I can't," Monfils said. I do not feel well."

Gael Monfils, who lost in 5 to Ruusuvuori: "I would like to get out of this nightmare but I can't."

(via @QuentinMoynet)pic.twitter.com/BEkzQobMLu

7.02am GMT

Around the grounds, Pablo Carreno Busta has taken the first set against Kei Nishikori, Mihaela Buzrnescu has claimed the second set against Bianca Andreescu and the pair are neck and neck in the decider, and Grigor Dimitrov has begun his battle with Marin ili.