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The 22nd seed overpowered the 2017 Roland Garros champion Jelena Ostapenko of Latvia 6-2, 6-4 in the one hour and 19 minutes encounter here at Rod Laver Arena, becoming the first woman representing Kazakhstan to reach the final four at Melbourne Park. Ostapenko had dominated her head-to-head with the Kazakh player in the past.

On Sunday evening, Zhu walked onto the centre court of the Rod Laver Arena -- the largest venue in Melbourne Park with a capacity of 15,000 seats -- for a fourth-round clash against former world No. 1 Victoria Azarenka. After crashing out of the qualifying campaign 15 times, exiting seven times in the opening round and reaching the round of 64 four times.

In a dominant display, former world No 1 moved freely to dispatch the Australian 6-2, 6-1, 6-2 at the Rod Laver Arena. The Serb will next play Andrey Rublev after the fifth seed saved two match points en route to edging Holger Rune in a five-set thriller. In their first ATP head-to-head meeting, Djokovic was locked in from the first ball.

The Indian pair defeated Japan's Makoto Ninomiya and Uruguay's Ariel Behar 6-4, 7-6(11-9) in their second-round match to set up a quarterfinal clash with Latvian-Spanish duo Jelena Ostapenko and David Vega Hernandez. Sania and Bopanna, the Rio Olympic semifinalists, had earlier beaten Australia's Jaimee Fourlis and Luke Saville in the first round.

For the first two sets, Tsitsipas stayed on track to repeat his straight-sets quarterfinal win against the Italian in Melbourne a year ago, but his hopes of a similarly one-sided result were dashed by a remarkable change in level from his opponent. An increasingly confident Sinner dominated the baseline exchanges in the third and fourth sets to carry the momentum into a decider on Rod Laver Arena.

"I thought it was really high level, first set especially. Got a little tricky there trying to close that first set out. It's tough when you play someone that has a lot of experience, that it can flip a match. I'm glad that I was able to fight and win that first set, then kind of go on a roll from there," Jessica Pegula added.

The 29th-seed American advanced to the last eight at a Grand Slam for the first time with a back-and-forth 3-6, 6-3, 6-2, 1-6, 7-6(10-7) victory against the Polish star. He will play Karen Khachanov for a place in the semifinals. "It was difficult but I'm very happy with the way I kind of just stayed down, kept going through it," he said.

Ostapenko, competing in her first Round 4 at the Australian Open, leveled her career head-to-head against Gauff to 1-1 with a 93-minute triumph in Margaret Court Arena, her first over a Top 10 player at a Grand Slam in three years, and the first Grand Slam quarterfinal appearance since 2018.

Struggling with the hamstring injury that has plagued him since Adelaide, Djokovic looked in discomfort throughout his clash against Grigor Dimitrov. However, the Serbian dug deep and overcame the 27th seed 7-6(7), 6-3, 6-4 to reach the fourth round. "Every point and game mattered. The turning point for both players was right from the start. Making an early break was important. I didn't know how I was going to feel physically. I was going up and down," Djokovic said.

After winning a tight first set, in which he twice squandered break advantages, the Australian pulled away, committing just 12 unforced errors in the second and third sets combined to seal victory after two hours and 10 minutes. With his fourth victory of the season, De Minaur now leads Bonzi 3-0 in their ATP Head to Head series.