Australian Open 2020: The major happenings on Day 3

Defending champion Djokovic eased into the third round after making short work of Japanese wildcard Tatsuma Ito.

The 32-year-old Serb is chasing a 17th Grand Slam and eighth Australian Open title.

He won the tie 6-1, 6-4, 6-2 in one hour and 35 minutes.

He will be up against Japan's Yoshihito Nishioka next.

The latter overcame Britain's Dan Evans 6-4, 6-3, 6-4.

Meanwhile, men's sixth seed Stefanos Tsitsipas moved into the last 32 after opponent Philipp Kohlschreiber withdrew injured.

Organizers claimed the 36-year-old German had a muscle strain.

Tsitsipas, 21, will face Canadian Milos Raonic in the third round.

Raonic beat Christian Garin 6,3, 6-4, 6-2.

Marin Cilic prevailed in a five-set thriller.

He beat Benoit Paire 6-2, 6-7, 3-6, 6-1, 7-6.

Japanese third seed Osaka overcame Saisai Zheng 6-2, 6-4 before 15-year-old Gauff saw off Romania's Sorana Cirstea.

Gauff was 3-0 down in the decider but fought back to win 4-6, 6-3, 7-5 in two hours and six minutes.

"It's amazing," said Gauff. "Honestly, I didn't think I would get so much support in Australia. I was down 3-0 and you really made me believe."

Women's world number one Ashleigh Barty eased to a 6-1, 6-4 victory against Slovenia's Polona Hercog in just over an hour.

The retiring Caroline Wozniaki sealed a 7-5, 7-5 win against Dayana Yastremska to progress.

Last year's finalist, Petra Kvitova, progressed with a 7-5, 7-5 victory over Spain's Paula Badosa.

Elena Rybakina overcame Greet Minnen 6-3, 6-4 in straight sets.

In the other matches, American 14th seed Sofia Kenin beat Ann Li 6-1, 6-3, while Germany's Julia Goerges knocked out Croatia's 13th seed Petra Martic in a 4-6, 6-3, 7-5 victory.

Spain's Carla Suarez Navarro won her first-round match against Belarusian 11th seed Aryna Sabalenka 7-6 (8-6), 7-6, (8-6) to set up a meeting with 18-year-old Iga Swiatek from Poland.