| Men's doubles | |
|---|---|
| 2021 Columbus Challenger | |
| Champions |  Stefan Kozlov  Peter Polansky |
| Runners-up | Andrew Lutschaunig James Trotter |
| Score | 7–5, 7–6(7–5) |
Treat Huey and Nathaniel Lammons were the defending champions [1] but chose not to defend their title.
Stefan Kozlov and Peter Polansky won the title after defeating Andrew Lutschaunig and James Trotter 7–5, 7–6(7–5) in the final.
Robert Galloway / Alex Lawson (semifinals) Evan King / Jackson Withrow (quarterfinals) Christian Harrison / Dennis Novikov (first round)
Nam Ji-sung / Song Min-kyu (quarterfinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | R Galloway A Lawson | 6 | 6 | ||||||||||||||||||||||||
 D King  R Roelofse | 3 | 4 | 1 | R Galloway A Lawson | 6 | 6 | |||||||||||||||||||||
| WC | C Kingsley Jake Van Emburgh | 1 | 3 | A Galarneau A Kovacevic | 4 | 4 | |||||||||||||||||||||
| A Galarneau A Kovacevic | 6 | 6 | 1 | R Galloway A Lawson | 5 | 6 | [2] | ||||||||||||||||||||
| 4 | J-s Nam M-k Song | 6 | 3 | [10] | S Kozlov P Polansky | 7 | 3 | [10] | |||||||||||||||||||
JC Aragone  N Barrientos | 2 | 6 | [4] | 4 | J-s Nam M-k Song | 3 | 78 | [6] | |||||||||||||||||||
 G Brouwer R Stalder | 5 | 6 | [7] | S Kozlov P Polansky | 6 | 66 | [10] | ||||||||||||||||||||
| S Kozlov P Polansky | 7 | 4 | [10] | S Kozlov P Polansky | 7 | 77 | |||||||||||||||||||||
| N Mejía M Mmoh | WC | A Lutschaunig J Trotter | 5 | 65 | |||||||||||||||||||||||
| W Blumberg M Schnur | w/o | W Blumberg M Schnur | 65 | 6 | [8] | ||||||||||||||||||||||
| Y-s Chung S-c Hong | 5 | 7 | [15] | Y-s Chung S-c Hong | 77 | 4 | [10] | ||||||||||||||||||||
| 3 | C Harrison D Novikov | 7 | 5 | [13] | Y-s Chung S-c Hong | 2 | 4 | ||||||||||||||||||||
| WC | Andrew Lutschaunig J Trotter | w/o | WC | A Lutschaunig J Trotter | 6 | 6 | |||||||||||||||||||||
| WC | J Boulais R Cash | WC | A Lutschaunig J Trotter | 77 | 5 | [10] | |||||||||||||||||||||
 T Fancutt J Kubler | 6 | 2 | [8] | 2 | E King J Withrow | 64 | 7 | [7] | |||||||||||||||||||
| 2 | E King J Withrow | 4 | 6 | [10] | |||||||||||||||||||||||
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