2021 US Open – Boys' doubles
| Boys' doubles | |
|---|---|
| 2021 US Open | |
| Champions | Max Westphal Coleman Wong |
| Runners-up | Viacheslav Bielinskyi Petr Nesterov |
| Score | 6–3, 5–7, [10–1] |
Eliot Spizzirri and Tyler Zink were the defending champions, having won the previous edition in 2019, however both players were no longer eligible to participate in junior events. Spizzirri and Zink received a wildcard in the men's doubles event, where they lost in the first round.
Max Westphal and Coleman Wong won the title, defeating Viacheslav Bielinskyi and Petr Nesterov in the final, 6–3, 5–7, [10–1].