| ITF - M15 Monastir | 02/13 08:30 | 28 | Mertens, Yannick v Gauthier Onclin | 6-3,1-6,2-6 | |
| ITF - M15 Monastir | 02/12 10:05 | 27 | Mertens, Yannick v Juan Bautista Torres | 6-2,6-3 | |
| ITF - M15 Monastir | 02/11 08:25 | 26 | Mertens, Yannick v Mugevicius, Lukas | 6-1,6-1 | |
| ITF - M15 Monastir | 02/10 08:30 | 25 | Mertens, Yannick v Stuart Parker | 5-7,6-4,6-3 | |
| ITF - M15 Monastir | 02/07 08:30 | 29 | Mertens, Yannick v Stuart Parker | 3-6,6-4,6-7 | |
| ITF - M15 Monastir | 02/06 08:30 | 28 | Mertens, Yannick v Kocevar-Desman, Tom | 6-3,6-2 | |
| ITF - M15 Monastir | 02/05 09:30 | 27 | [357] Skander Mansouri v Mertens, Yannick [483] | 6-3,1-6,4-6 | |
| ITF - M15 Monastir | 02/04 08:30 | 26 | Ajavon, Liova v Mertens, Yannick | 6-7,3-6 | |
| ITF - M15 Monastir | 02/03 08:30 | 25 | Alexandre Ruscica v Mertens, Yannick | 4-6,1-6 | |
| ITF M15 Parnu | 11/04 10:55 | 25 | Eric Vanshelboim v Mertens, Yannick | 4-6,6-3,6-4 | |
| ITF M25 Plaisir | 09/19 15:25 | 28 | Mertens, Yannick v Igor Sijsling | 1-6,6-7 | |
| ITF M25 Plaisir | 09/18 11:00 | 27 | [407] Michael Geerts v Mertens, Yannick [475] | 6-7,0-6 | |
| ITF M25 Plaisir | 09/17 13:15 | 26 | [475] Mertens, Yannick v Pedro Sakamoto [305] | 6-1,6-3 | |
| ITF M25 Plaisir | 09/16 12:00 | 25 | [475] Mertens, Yannick v Barrientos, Nicolas [262] | 1-6,6-2,6-3 | |
| ITF M15 Faro | 03/05 12:00 | 26 | [466] Mertens, Yannick v Alberto Barroso Campos [470] | 7-6,6-7,2-6 | |
| ITF M15 Faro | 03/04 10:00 | 25 | Mertens, Yannick v Dembek, Michal | 6-2,7-5 | |
| ITF - M25 Sunderland | 02/27 10:00 | 26 | [463] Mertens, Yannick v Dan Added [379] | 3-6,7-6,6-7 | |
| ITF - M25 Sunderland | 02/25 09:55 | 25 | Mertens, Yannick v Patten, Henry | 7-6,4-6,6-4 | |
| Challenger - Koblenz | 02/17 16:05 | 24 | [298] Mirza Basic v Mertens, Yannick [465] | 6-3,6-1 | |
| ITF - M15 Grenoble | 02/12 11:45 | 25 | Mertens, Yannick v Titouan Droguet | 7-6,4-6,4-6 | |
| ITF - M15 Veigy-Foncenex | 01/28 13:55 | 25 | Alexis Gautier v Mertens, Yannick | 6-2,7-6 | |
| ITF - M15 Bressuire | 01/23 12:10 | 26 | Mertens, Yannick v Anton Matusevich | 7-6,6-7,5-7 | |
| ITF - M15 Bressuire | 01/22 12:05 | 25 | Mertens, Yannick v Titouan Droguet | 6-4,6-2 | |
| ITF M15 Villers Les Nancy | 11/14 19:05 | 26 | Harold Mayot v Mertens, Yannick | 6-2,6-3 | |
| ITF M15 Villers Les Nancy | 11/13 14:25 | 25 | Pontico, Hugo v Mertens, Yannick | 2-6,4-6 | |
| ITF - M25 Saint-Dizier | 11/05 15:00 | 25 | [419] Mertens, Yannick v Evan Furness [410] | 3-6,3-6 | |
| ITF M25 Rodez | 10/19 14:25 | 28 | [416] Mertens, Yannick v Hugo Gaston [290] | 6-7,4-6 | |
| ITF M25 Rodez | 10/18 10:05 | 27 | [210] Mathias Bourgue v Mertens, Yannick [416] | 6-3,4-6,3-6 | |
| ITF M25 Rodez | 10/17 10:40 | 26 | Mertens, Yannick v Jacq, Gregoire | 6-3,6-3 | |
| ITF M25 Rodez | 10/16 10:00 | 25 | [301] Albano Olivetti v Mertens, Yannick [416] | 3-6,3-6 |