| Doubles | |
|---|---|
| 2021 Hall of Fame Open | |
| Champions | |
| Runners-up | |
| Score | 6–2, 7–6(7–3) |
Marcel Granollers and Sergiy Stakhovsky were the reigning champions from when the tournament was last held in 2019, but chose not to defend their title. [1]
William Blumberg and Jack Sock won the title, defeating Austin Krajicek and Vasek Pospisil in the final, 6–2, 7–6(7–3). [2]
Marcus Daniell / 
Ben McLachlan (first round)
Jonathan Erlich / 
Santiago González (semifinals)
Harri Heliövaara / 
John-Patrick Smith (quarterfinals)
Luke Bambridge / Matt Reid (withdrew)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | 5 | 3 | |||||||||||||||||||||||||
 A Krajicek  V Pospisil | 7 | 6 | A Krajicek V Pospisil | 6 | 714 | ||||||||||||||||||||||
H Reese  S Verbeek | 6 | 7 | 3 | 612 | |||||||||||||||||||||||
| 1 | 5 | A Krajicek V Pospisil | w/o | ||||||||||||||||||||||||
| Alt | Y Nishioka Y Uchiyama | 1 | 7 | [10] | |||||||||||||||||||||||
| 6 | 5 | [7] | Alt | 3 | 65 | ||||||||||||||||||||||
 J Sousa J Thompson | 6 | 6 | J Sousa J Thompson | 6 | 77 | ||||||||||||||||||||||
| 4 | 2 | 2 | 63 | ||||||||||||||||||||||||
| 63 | 7 | [6] | WC | W Blumberg J Sock | 6 | 77 | |||||||||||||||||||||
| WC | W Blumberg J Sock | 77 | 5 | [10] | WC | W Blumberg J Sock | 6 | 6 | |||||||||||||||||||
| 4 | 77 | [7] | 3 | 4 | 3 | ||||||||||||||||||||||
| 3 | H Heliövaara J-P Smith | 6 | 62 | [10] | WC | W Blumberg J Sock | 77 | 6 | |||||||||||||||||||
| 6 | 62 | [8] | 2 | 60 | 3 | ||||||||||||||||||||||
| WC |  A Bublik D Novikov | 4 | 77 | [10] | WC | ||||||||||||||||||||||
| 64 | 3 | 2 | J Erlich S González | w/o | |||||||||||||||||||||||
| 2 | J Erlich S González | 77 | 6 | ||||||||||||||||||||||||
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