Miami Open - ATP 3R start

Third round commenced in Miami Open - ATP Masters 1000

2021 Miami Open - an ATP Masters 1000 tournament, on Hard Outdoor, in Miami, Florida, USA, 22 March - 4 April 2021.

Event not held last year due to COVID-19.

2019 champion (not defending):

Roger Federer (4) who defeated John Isner (7) 6-1 6-4

Third round results:

- Daniil Medvedev (1) defeated Alexei Popyrin 7-6(3) 6-7(7) 6-4

- Frances Tiafoe defeated Dusan Lajovic (16) 1-6 7-5 6-3

- John Isner (18) defeated Felix Auger-Aliassime (11) 7-6(5) 7-6(5)

- Roberto Bautista Agut (7) defeated Jan-Lennard Struff (31) 4-6 6-3 6-2

- Emil Ruusuvuori defeated Mikael Ymer 4-6 6-1 7-5

- Jannik Sinner (21) defeated Karen Khachanov (14) 4-6 7-6(2) 6-4

- Taylor Fritz (22) defeated Cameron Norrie 6-4 3-6 6-1

- Alexander Bublik (32) defeated James Duckworth 6-4 6-4

Round of sixteen match ups 

Daniil Medvedev (1) v Frances Tiafoe 

John Isner (18) v Roberto Bautista Agut (7)

Emil Ruusuvuori v Jannik Sinner (21)

Taylor Fritz (22) v Alexander Bublik (32)