Stadium: Court Central Round: 26 Ground: Hardcourt indoor
| ITF M25 Plaisir | 2019/09/21 14:30 | Mertens, Yannick v Jacq, Gregoire | 6-4,7-6 |
| Challenger Rennes | 2019/01/21 09:00 | Jacq, Gregoire v Mertens, Yannick | 7-5,6-2 |
| France F19, Singles | 2016/09/21 09:00 | Jacq, Gregoire v Mertens, Yannick | 4-6,2-6 |
| France F4, Singles | 2015/03/04 18:55 | Jacq, Gregoire v Mertens, Yannick | 4-6,7-6,1-6 |
| ITF M25 Rodez | 2019/10/16 10:00 | Albano Olivetti v Mertens, Yannick | 3-6,3-6 |
| Oliveira De Azemeis, Singles Q M-ITF-POR-15A | 2019/09/27 10:00 | Mertens, Yannick v Skander Mansouri | 3-6,5-7 |
| Oliveira De Azemeis, Singles Q M-ITF-POR-15A | 2019/09/26 10:00 | Mertens, Yannick v John Echeverria | 6-2,6-4 |
| Oliveira De Azemeis, Singles Q M-ITF-POR-15A | 2019/09/25 10:00 | Mertens, Yannick v Das, Terence | 6-2,2-6,6-2 |
| ITF M25 Plaisir | 2019/09/22 12:30 | Heyman, Christopher v Mertens, Yannick | 3-6,0-6 |
| ITF M25 Plaisir | 2019/09/21 14:30 | Mertens, Yannick v Jacq, Gregoire | 6-4,7-6 |
| ITF M25 Plaisir | 2019/09/20 11:30 | Mertens, Yannick v Valentin Royer | 7-6,6-3 |
| ITF M25 Plaisir | 2019/09/19 11:30 | Mertens, Yannick v Joffrey De Schepper | 6-1,4-6,6-4 |
| ITF M25 Rodez | 2019/10/16 11:35 | Jacq, Gregoire v Joffrey De Schepper | 6-4,6-3 |
| ITF M25 Nevers | 2019/10/04 10:00 | Quentin Halys v Jacq, Gregoire | 4-6,6-3,6-4 |
| ITF M25 Nevers | 2019/10/03 16:00 | Maxence Beauge v Jacq, Gregoire | 3-6,7-6,4-6 |
| ITF M25 Nevers | 2019/10/02 10:30 | Axel Garcian v Jacq, Gregoire | 3-6,2-6 |
| ITF M25 Plaisir | 2019/09/21 14:30 | Mertens, Yannick v Jacq, Gregoire | 6-4,7-6 |
| ITF M25 Plaisir | 2019/09/20 12:55 | Jacq, Gregoire v Lucas Poullain | 6-4,6-3 |
| ITF M25 Plaisir | 2019/09/19 13:35 | Jacq, Gregoire v Eysseric, Jonathan | 7-6,7-6 |
| Mulhouse, Singles M-ITF-FRA-16A | 2019/09/13 10:00 | Jacq, Gregoire v Simon, Tobias | 4-6,6-7 |