Rod Laver Arena
| Irina-Camelia Begu 6-2, 3-6, 2-6 Amanda Anisimova | WTA 2 – Quartas de final |
| Viktorija Golubic 2-6, 7-5, 4-6 Simona Halep | WTA 1 – Quartas de final |
| Rafael Nadal W.O. Tallon Griekspoor | ATP – Quartas de final |
| Botic Van de Zandschulp 7-6(7-5), 0-6, 5-7 Grigor Dimitrov | ATP – Quartas de final |
| Naomi Osaka 6-1, 7-5 Andrea Petkovic | WTA 1 – Quartas de final |
Margaret Court Arena
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| Ana Konjuh 6-7(1-7), 6-7(6-8) Qinwen Zheng | WTA 1 – Quartas de final |
| Daria Kasatkina 7-5, 6-1 Nuria Parrizas Diaz | WTA 2 – Quartas de final |
| Clara Tauson 3-6, 0-2 Aliaksandra Sasnovich | WTA 2 – Quartas de final |
| Ann Li 6-1, 7-5 Kamilla Rakhimova | WTA 2 – Quartas de final |
| Veronika Kudermetova 6-2, 6-4, 6-0 Anastasia Potapova | WTA 1 – Quartas de final |
John Cain Arena
| Marcelo Arevalo/Jean-Julien Rojer 6-1, 6-3 Hans Hach Verdugo/Stefano Travaglia | ATP – Quartas de final |
| Alex Molcan 2-6, 1-6 Emil Ruusuvuori | ATP – Quartas de final |
| Aleksandr Nedovyesov/Aisam-ul-Haq Qureshi 6-3, 7-6(8-6) Andrey Golubev/Franko Skugor | ATP – Quartas de final |
| Jaume Munar 6-7(3-7), 4-6 Maxime Cressy | ATP – Quartas de final |
Quadra 7
| Destanee Aiava/Lizette Cabrera 7-5, 1-6, 10-6 Kristen Flipkens/Sara Sorribes Tormo | WTA 1 – Quartas de final |
| Julia Lohoff/Kimberley Zimmermann 0-6, 5-7 Asia Muhammad/Jessica Pegula | WTA 1 – Quartas de final |
| Tereza Martincova/Mayar Sherif 6-2, 6-4 Viktorija Golubic/Astra Sharma | WTA 2 – Quartas de final |
Quadra 8
| Marcus Daniell/Denis Kudla 6-2, 6-7(5-7), 8-10 Ricardas Berankis/Denys Molchanov | ATP – Quartas de final |
| Wesley Koolhof/Neal Skupski W.O. Romail Arneodo/Andreas Mies | ATP – Quartas de final |