Stadium: Court Central Round: 27 Ground: Clay
| ITF France F13 | 2018/07/12 18:30 | Mertens, Yannick v Lakat, Florian | 6-3,6-4 |
| ITF France F13 | 2018/07/10 13:40 | Mertens, Yannick v Voljacques, Hugo | 6-2,6-2 |
| Challenger Recanati Qual | 2018/07/02 10:00 | Tomas Barrios Vera v Mertens, Yannick | 7-6,6-3 |
| Challenger Recanati Qual | 2018/07/01 08:00 | Frigerio, Lorenzo v Mertens, Yannick | 4-6,4-6 |
| Challenger Recanati Qual | 2018/06/30 11:15 | Vernier, Michel v Mertens, Yannick | 2-6,4-6 |
| ATP Eastbourne Qual | 2018/06/23 14:35 | Mertens, Yannick v Quiroz, Roberto | 6-3,4-6,3-6 |
| Fergana, Uzbekistan | 2018/06/18 10:55 | Dustov, Farrukh v Mertens, Yannick | 6-4,4-6,6-3 |
| ATP Lyon Qual | 2018/05/19 08:30 | Laslo Djere v Mertens, Yannick | 6-4,6-3 |
| ITF France F13 | 2018/07/12 16:00 | Louis Tessa v Sora Fukuda | 7-6,2-6,0-6 |
| ITF France F13 | 2018/07/10 08:30 | Portales, Nino v Sora Fukuda | 0-6,4-6 |
| ITF Japan F8 | 2018/06/13 01:00 | Sora Fukuda v Kawakami, Rimpei | 6-1,3-6,3-6 |
| ITF Japan F7 | 2018/06/08 01:00 | Sora Fukuda v Saito, Takashi | 1-6,6-2,4-6 |
| ITF Japan F7 | 2018/06/07 02:00 | Sora Fukuda v Masamichi Imamura | 6-3,6-2 |
| ITF Japan F7 | 2018/06/05 01:00 | Sora Fukuda v Issei Okamura | 6-3,6-1 |
| ITF France F9 | 2018/05/02 09:30 | Sora Fukuda v Avidzba, Alen | 0-6,0-6 |
| ITF Japan F6 | 2018/04/13 01:00 | Ehara, Hiroyasu v Sora Fukuda | 7-6,6-2 |