World number 48 Gauff, touted as a potential successor to American great Serena Williams, claimed the biggest victory of her young career at her Australian Open debut last year, knocking out defending champion Naomi Osaka before falling to eventual winner Sofia Kenin in the fourth round.
It was Gauff's second appearance in the second week of a Grand Slam before her 16th birthday, having made the fourth round at her Wimbledon debut in 2019.
Third seed Elina Svitolina eased into the last 16 on Monday with a 6-1 6-4 win over Andrea Petkovic.
Top seed Simona Halep beat Anastasia Potapova 6-4 6-4 in the evening session and said she was pleased to get the win in her first competitive match since the French Open in October.
"I just wanted to feel the court, feel the game.
I knew it was going to be a difficult match, she hits very strong," Halep said in a post-match interview.
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- Coco Gauff through in 3 tough sets in Australian Open tuneupHindustan Times
- Tennis: Svitolina beats Petkovic, moves to 1/8 finals of Gippsland Trophy112 International
- Svitolina, Gauff, Cornet charge ahead at Gippsland TrophyWTA Tennis
- WTA Gippsland Trophy: Cori Gauff played the MATCH OF THE DAYTennis World
- Coco Gauff Credits Offseason Training for Thrilling Match Victory at WTA Melbourne 2EssentiallySports
- Katie Boulter impresses on season opener beating Anna Kalinskaya ahead of 2021 Australian OpenThe Independent
