| Champ: |  Jo-Wilfried Tsonga |
| Runner: | Aljaž Bedene |
| Score: | 6–7(4–7), 7–6(7–4), 6–3 |
| Draw: | 28 (4 / 3) |
| Seeds: | 8 |
| After Year: | 2021 |
| Type: | singles doubles |
See main article: 2019 Moselle Open.
Gilles Simon was the defending champion,[1] but lost in the second round to Aljaž Bedene.
Jo-Wilfried Tsonga won a record fourth title in Metz, defeating Bedene in the final, 6–7(4–7), 7–6(7–4), 6–3.
The top four seeds received a bye into the second round.