| Champ: |  Matteo Berrettini |
| Runner: |  Filip Krajinović |
| Score: | 4–6, 6–3, 6–1 |
| Draw: | 28 (4 / 2) |
| Seeds: | 8 |
| Type: | singles doubles |
| Before Name: | Gazprom Hungarian Open |
See main article: 2019 Hungarian Open (tennis).
Marco Cecchinato was the defending champion,[1] but withdrew due to illness.
Matteo Berrettini won the title, defeating Filip Krajinović in the final, 4–6, 6–3, 6–1.
This is the first ATP Tour-level appearance of future world No. 1 and two-time major champion Jannik Sinner. He lost in the second round to Laslo Đere.
The top four seeds received a bye into the second round.