2018 Diema Xtra Sofia Open – Singles
| Singles | |
|---|---|
| 2018 Diema Xtra Sofia Open | |
| Champion | Mirza Bašić |
| Runner-up | Marius Copil |
| Score | 7–6(8–6), 6–7(4–7), 6–4 |
| Draw | 28 (4 Q / 3 WC ) |
| Seeds | 8 |
Grigor Dimitrov was the defending champion, but withdrew before the tournament because of a shoulder injury.
Mirza Bašić won his first ATP title, defeating Marius Copil in the final, 7–6(8–6), 6–7(4–7), 6–4.