|2021 Miami Open|
|Date||March 23 - April 4|
|Category||Masters 1000 (ATP)|
WTA 1000 (WTA)
|Prize money||$4,299,205 (ATP)|
|Location||Miami Gardens, Florida, United States|
|Venue||Hard Rock Stadium|
|Nikola Mekti? / Mate Pavi?|
|Shuko Aoyama / Ena Shibahara|
The 2021 Miami Open (sponsored by Itaú) was a professional hardcourt tennis tournament played from March 23 to April 4, 2021 on the grounds of Hard Rock Stadium in Miami Gardens, Florida. The 36th edition of the Miami Open, it was a Masters 1000 event on the 2021 ATP Tour, and a WTA 1000 event on the 2021 WTA Tour. The 2020 edition was postponed due to the onset of the COVID-19 pandemic in Florida.
Due to COVID-19 restrictions, capacity for each session was limited to 800-1,000 spectators, and spectators were only admitted in the three largest courts on the site (excluding Hard Rock Stadium proper, which was not used). Roger Federer and Ashleigh Barty were the defending champions from 2019 in the men's and women's singles respectively. Barty successfully defended her title, defeating Bianca Andreescu in the final, 6-3, 4-0, retired. Federer did not attend the tournament.
|Event||W||F||SF||QF||Round of 16||Round of 32||Round of 64||Round of 128||Q||Q2||Q1|
* Players with byes receive first round points.
|Event||W||F||SF||QF||Round of 16||Round of 32||Round of 64||Round of 128||Q2||Q1|