Miami Open - WTA 3R Start

Third round commenced 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

Third round results:

- Ashleigh Barty (1) defeated Jelena Ostapenko 6-3 6-2

- Victoria Azarenka (14) defeated Angelique Kerber (24) 7-5 6-2

- Marketa Vondrousova (19) defeated Belinda Bencic (11) 4-6 6-4 6-4

- Aryna Sabalenka (7) defeated Veronika Kudermetova (32) 7-6(4) 6-4

- Anastasija Sevastova received a walkover from Simona Halep (3) due to a shoulder injury

- Wildcard Ana Konjuh defeated Iga Swiatek (15) 6-4 2-6 6-2

- Petra Kvitová (9) defeated Johanna Konta (17) 6-1 6-2

- Elina Svitolina (5) defeated Ekaterina Alexandrova (30) 7-6(1) 6-4

Round of sixteen match ups 

Ashleigh Barty (1) v Victoria Azarenka (14)

Marketa Vondrousova (19) v Aryna Sabalenka (7)

Anastasija Sevastova v wildcard Ana Konjuh

Petra Kvitová (9) v Elina Svitolina (5)