2019 Citi Open – Men's singles
| Men's singles | |
|---|---|
| 2019 Citi Open | |
| Champion | Nick Kyrgios |
| Runner-up | Daniil Medvedev |
| Score | 7–6(8–6), 7–6(7–4) |
| Draw | 48 (6Q / 4WC) |
| Seeds | 16 |
Nick Kyrgios defeated Daniil Medvedev in the final, 7–6(8–6), 7–6(7–4) to win the men's singles tennis title at the 2019 Washington Open. Kyrgios saved a match point in the semifinals against Stefanos Tsitsipas.
Alexander Zverev was the two-time reigning champion, but did not defend his title.