The 2021 Phillip Island Trophy is a tournament on the 2021 WTA Tour, one of six events in the 2021 Melbourne Summer Series. It was played on outdoor hard courts in Melbourne, Australia. It was organised as a lead-up tournament to the 2021 Australian Open, and was held at the same venue, due to other tournaments in Australia being cancelled as a result from the COVID-19 pandemic. This tournament took place simultaneously with the second week of the 2021 Australian Open.^[1]

• Daria Kasatkina def. Marie Bouzková 4–6, 6–2, 6–2

• Ankita Raina / Kamilla Rakhimova def. Anna Blinkova / Anastasia Potapova 2–6, 6–4, [10–7]

_{*per team}

Country	Player	Ranka	Seed
USA	Sofia Kenin	4	1
CAN	Bianca Andreescu	9	2
GBR	Johanna Konta	15	3
CRO	Petra Martić	19	4
CHN	Wang Qiang	34	5
CHN	Zhang Shuai	35	6
RUS	Anastasia Pavlyuchenkova	39	7
USA	Danielle Collins	40	8
USA	Sloane Stephens	41	9
FRA	Caroline Garcia	43	10
CHN	Zheng Saisai	44	11
ARG	Nadia Podoroska	45	12
CZE	Marie Bouzková	50	13
LAT	Anastasija Sevastova	53	14
FRA	Alizé Cornet	54	15
SWE	Rebecca Peterson	55	16

^a Rankings are as of 8 February 2021

The following players received wildcards into the singles main draw:

• Destanee Aiava
• Bianca Andreescu
• Kimberly Birrell
• Olivia Gadecki
• Sofia Kenin

The following players used a protected ranking to enter the singles main draw:

• Katie Boulter
• Zhu Lin

The following players received entry from the qualifying draw:

• Mona Barthel
• Mihaela Buzărnescu
• Lizette Cabrera
• Francesca Jones
• Varvara Lepchenko
• Rebecca Marino
• Ankita Raina
• Kamilla Rakhimova

The following players received entry as lucky losers:

• Gabriella Da Silva-Fick
• Monica Niculescu
• Lesia Tsurenko

Before the tournament

• Ekaterina Alexandrova → replaced by Lesia Tsurenko
• Amanda Anisimova → replaced by Ajla Tomljanović
• Catherine Bellis → replaced by Daria Kasatkina
• Belinda Bencic → replaced by Nao Hibino
• Jennifer Brady → replaced by Zhu Lin
• Fiona Ferro → replaced by Lauren Davis
• Coco Gauff → replaced by Danka Kovinić
• Polona Hercog → replaced by Irina-Camelia Begu
• Madison Keys → replaced by Anna Blinkova
• Johanna Konta → replaced by Gabriella Da Silva-Fick
• Veronika Kudermetova → replaced by Zarina Diyas
• Svetlana Kuznetsova → replaced by Christina McHale
• Ons Jabeur → replaced by Madison Brengle
• Magda Linette → replaced by Misaki Doi
• Elise Mertens → replaced by Katie Boulter
• Kristina Mladenovic → replaced by Aliaksandra Sasnovich
• Garbiñe Muguruza → replaced by Ana Bogdan
• Jeļena Ostapenko → replaced by Varvara Gracheva
• Yulia Putintseva → replaced by Wang Yafan
• Alison Riske → replaced by Anastasia Potapova
• Elena Rybakina → replaced by Andrea Petkovic
• Laura Siegemund → replaced by Greet Minnen
• Barbora Strýcová → replaced by Tímea Babos
• Iga Świątek → replaced by Liudmila Samsonova
• Donna Vekić → replaced by Maddison Inglis
• Markéta Vondroušová → replaced by Sara Errani
• Heather Watson → replaced by Elisabetta Cocciaretto
• Dayana Yastremska → replaced by Sara Sorribes Tormo
• Zhang Shuai → replaced by Monica Niculescu

During the tournament

• Sara Sorribes Tormo

• Zarina Diyas
• Danka Kovinić
• Patricia Maria Țig

Country	Player	Country	Player	Rankb	Seed
TPE	Chan Hao-ching	TPE	Latisha Chan	32	1
ROU	Monica Niculescu	CHN	Yang Zhaoxuan	108	2
USA	Kaitlyn Christian	USA	Sabrina Santamaria	132	3
ROU	Andreea Mitu	ROU	Raluca Olaru	138	4
GEO	Oksana Kalashnikova	SWE	Cornelia Lister	143	5
BEL	Kirsten Flipkens	BEL	Greet Minnen	145	6
JPN	Makoto Ninomiya	CHN	Wang Yafan	147	7
JPN	Misaki Doi	JPN	Nao Hibino	151	8

^b Rankings are as of 8 February 2021.

The following pair received a wildcard into the doubles main draw:

• Destanee Aiava / Charlotte Kempenaers-Pocz

During the tournament

• Kimberly Birrell / Olivia Gadecki
• Misaki Doi / Nao Hibino
• Marie Bouzková / Sara Sorribes Tormo