Stadium: Court 8 Round: 25 Ground: Hardcourt indoor
| Challenger Recanati Qual | 2018/07/01 08:00 | Lorenzo Frigerio v Yannick Mertens | 4-6,4-6 |
| ITF M15 Sharm El Sheikh | 2019/01/31 09:45 | Yannick Mertens v Pablo Vivero Gonzalez | 2-6,6-4,2-6 |
| ITF M15 Sharm El Sheikh | 2019/01/30 12:15 | Yannick Mertens v Yu Hsiou Hsu | 6-3,6-0 |
| Challenger Rennes | 2019/01/24 15:35 | Elias Ymer v Yannick Mertens | 6-3,6-4 |
| Challenger Rennes | 2019/01/23 17:05 | Evgeny Karlovskiy v Yannick Mertens | 3-6,6-7 |
| Challenger Rennes | 2019/01/21 09:00 | Gregoire Jacq v Yannick Mertens | 7-5,6-2 |
| ITF M15 Bressuire | 2019/01/18 13:00 | Yannick Mertens v Leny Mitjana | 6-7,5-7 |
| ITF M15 Bressuire | 2019/01/17 11:00 | Christopher Heyman v Yannick Mertens | 3-6,0-6 |
| ITF M15 Bressuire | 2019/01/16 09:00 | Clement Tabur v Yannick Mertens | 2-6,3-6 |
| ITF M25 Nussloch | 2019/01/24 12:30 | Lorenzo Frigerio v Botic Van De Zandschulp | 2-6,3-6 |
| ITF M15 Bressuire | 2019/01/18 11:00 | Lorenzo Frigerio v Matteo Martineau | 4-6,3-6 |
| ITF M15 Bressuire | 2019/01/17 11:00 | Corentin Denolly v Lorenzo Frigerio | 7-6,6-7,3-6 |
| ITF M15 Bressuire | 2019/01/15 10:00 | Lorenzo Frigerio v Botic Van De Zandschulp | 7-6,6-0 |
| ITF M15 Bagnoles-de-l'Orne | 2019/01/10 09:00 | Lorenzo Frigerio v Clement Tabur | 3-6,4-6 |
| ITF M15 Bagnoles-de-l'Orne | 2019/01/08 09:00 | Lorenzo Frigerio v Alexis Musialek | 6-2,6-2 |
| ITF Qatar F6 | 2018/12/22 13:00 | Lorenzo Frigerio v Aslan Karatsev | 2-6,6-4,7-5 |
| ITF Qatar F6 | 2018/12/21 12:00 | Lorenzo Frigerio v Zizou Bergs | 6-3,6-3 |