Singles
Seeds
- 1. United States Sofia Kenin (Second round)
- 2. Canada Bianca Andreescu (Semifinals)
- 3. United Kingdom Johanna Konta (Withdrew)
- 4. Croatia Petra Martić (Quarterfinals)
- 5. China Wang Qiang (Third round)
- 6. China Zhang Shuai (Withdrew)
- 7. Russia Anastasia Pavlyuchenkova (Third round)
- 8. United States Danielle Collins (Semifinals)
- 9. United States Sloane Stephens (First round)
- 10. France Caroline Garcia (First round)
- 11. China Zheng Saisai (First round)
- 12. Argentina Nadia Podoroska (First round)
- 13. Czech Republic Marie Bouzková (Final)
- 14. Latvia Anastasija Sevastova (First round)
- 15. France Alizé Cornet (First round)
- 16. Sweden Rebecca Peterson (Quarterfinals)
Russia Daria Kasatkina def. Czech Republic Marie Bouzková 4–6, 6–2, 6–2
Doubles
Seeds
- Chinese Taipei Chan Hao-ching / Chinese Taipei Latisha Chan (Quarterfinals)
- Romania Monica Niculescu / China Yang Zhaoxuan (Second round)
- United States Kaitlyn Christian / United States Sabrina Santamaria (Second round)
- Romania Andreea Mitu / Romania Raluca Olaru (Second round)
- Georgia (country) Oksana Kalashnikova / Sweden Cornelia Lister (Second round)
- Belgium Kirsten Flipkens / Belgium Greet Minnen (Second round)
- Japan Makoto Ninomiya / China Wang Yafan (Semifinals)
- Japan Misaki Doi / Japan Nao Hibino (First round, withdrew)
India Ankita Raina / Russia Kamilla Rakhimova def. Russia Anna Blinkova / Russia Anastasia Potapova 2–6, 6–4, [10–7]
For more info about Phillip Island Trophy
2021 Phillip Island Troph Tennis