Tunisia's sixth-seeded Ons Jabeur got the better of two-time former champion Petra Kvitova while second seed Aryna Sabalenka got the better of Ekaterina Alexandrova as both of them advanced to the ladies' singles quarterfinals here on Monday.
Djokovic came back from a 1-4 deficit in the first set to win it in a tie-break and then claimed the next two sets to prevail over his Norwegian opponent 7-6(1), 6-3, 7-5.
The Spanish megastar lost his first match of this season against Cameron Norrie and now lost his second match against Australia's Alex de Minaur in three games as the hosts took a lead of 1-0 in their Group D encounter.
Djokovic is now allowed to not just enter Australia but also to participate in the Australian Open scheduled for the upcoming month.
Russian world No. 2 made history, winning his first major title with a stunning 6-4, 6-4, 6-4 win against Djokovic, who after winning the first three majors of the year, was trying to become the first man since Rod Laver in 1969 to win all four majors in one season.
The last time Tsitsipas squared off against a Grand Slam champion at a major, he came up agonisingly short
Djokovic posted a note to his fans on social media after the announcement
Nadal defeated Federer 6–4, 6–4, 6–7 (5–7), 6–7 (8–10), 9–7 in a match that lasted four hours and 48 minutes.