"I think my team always believed that I can do it. After last time I did really hard work on and off the court so I think it's really good work," Wang said in a post-match interview.

"During the second set I was a little bit confused because I lost, but I had to be calm...focus on every point and trust myself."

Meanwhile, 15-year-old sensation, Gauff defeated reigning champion Osaka with the youngster also overcoming a previous crushing loss to her opponent, going down 6-3, 6-0 in New York last year.

Despite her age, and last year's result, Gauff dispatched Osaka in only a little over an hour, displaying a more developed serve which took the Japanese third seed by surprise.

"You don't want to lose to a 15-year-old, you know, but I guess that's for me a reality check," Osaka said after the match.

"It doesn't really matter the age of the opponent, of course she deserves to be here, her serve is way better than I played her last year."

In the men's draw, Roger Federer remained in the competition, but only just, going five sets with Australia's John Millman, 4-6, 7-6 (2), 6-4, 4-6, 7-6 (8).

The Swiss master somehow came from 8-4 down in the match tiebreak, winning six consecutive points to claim his 100th win at the Australian Open and progress to the fourth round.

Meanwhile, Greek hopeful Stefanos Tsitsipas was rocked by outside chance, Milos Raonic from Canada, with the No. six seed going down in straight sets, 7-5, 6-4, 7-6 (2).

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