2018 Citi Open – Men's singles
| Men's singles | |
|---|---|
| 2018 Citi Open | |
| Champion | Alexander Zverev |
| Runner-up | Alex de Minaur |
| Score | 6–2, 6–4 |
| Draw | 48 (6Q / 4WC) |
| Seeds | 16 |
Alexander Zverev was the defending champion and successfully defended his title, defeating Alex de Minaur in the final, 6–2, 6–4.