Miami Open - WTA 1R complete

First round completed in Miami Open - WTA 1000.

2021 Miami Open - a WTA 1000 tournament, on Hard Outdoor, in Miami, Florida, USA, 22 March - 4 April 2021.

Event not held last year due to COVID-19.

Defending champion (2019):

Ashleigh Barty (12) who defeated Karolina Pliskova (5) 7-6(1) 6-3

25th seed Alison Riske withdrew after the main draw was published due to a left foot injury, and was replaced by lucky loser Kirsten Flipkens.

Flipkens received the first round bye originally given to Riske.

First round results:

- Qualifier Kristina Kucova defeated qualifier Hailey Baptiste 6-4 2-6 7-5

- Jelena Ostapenko defeated wildcard Wang Xiyu 6-4 6-7(4) 6-1

- Qualifier Renata Zarazua defeated Nao Hibino 6-4 4-6 6-1

- Wang Qiang defeated qualifier Aliona Bolsova 6-1 3-6 6-3

- Danielle Collins defeated Kristina Mladenovic 6-3 6-3

- Qualifier Tsvetana Pironkova defeated Marta Kostyuk 7-6(4) 3-6 6-3

- Caroline Garcia defeated qualifier Mihaela Buzarnescu 6-1 6-2

- Anastasija Sevastova defeated qualifier Olga Danilovic 6-1 3-6 7-6(3)

- Wildcard Ana Konjuh defeated Katerina Siniakova 7-6(3) 7-5

- Alizé Cornet defeated Svetlana Kuznetsova 2-6 6-2 6-1

- Qualifier Tereza Martincova defeated Yaroslava Shvedova 6-4 6-2

- Sloane Stephens defeated qualifier Oceane Dodin 6-7(6) 6-4 6-2

- Wildcard Anna Kalinskaya defeated Irina-Camelia Begu 6-4 7-6(5)

- Sara Sorribes Tormo defeated Bernarda Pera 6-2 2-6 7-5

- Andrea Petkovic defeated Zhang Shuai 7-5 6-1

- Zheng Saisai defeated Fiona Ferro 2-6 6-4 6-3

- Wildcard Storm Sanders defeated qualifier Elisabetta Cocciaretto 6-1 5-7 6-1

- Qualifier Liudmila Samsonova defeated Camila Giorgi 6-2 6-4

- Katie Boulter defeated Kristyna Pliskova 4-6 6-3 6-3

- Qualifier Nina Stojanovic defeated Heather Watson 6-4 6-1