Stadium: Court 6 Round: 26 Ground: Clay
| ATP Lyon Qual | 2018/05/19 08:30 | Laslo Djere v Yannick Mertens | 6-4,6-3 |
| Challenger Glasgow | 2018/05/02 11:40 | Yannick Mertens v Hiroki Moriya | 4-6,6-3,6-7 |
| ITF Tunisia F16 | 2018/04/29 09:00 | Yannick Mertens v Altug Celikbilek | 7-6,3-6,4-6 |
| ITF Tunisia F16 | 2018/04/28 09:00 | Yannick Mertens v Aidan Mchugh | 6-2,6-1 |
| ITF Tunisia F16 | 2018/04/27 10:50 | Yannick Mertens v Damien Bayard | 4-6,6-0,6-3 |
| ITF Tunisia F16 | 2018/04/26 11:00 | Yannick Mertens v Peter Bothwell | 6-0,6-4 |
| ITF Tunisia F16 | 2018/04/25 10:45 | Yannick Mertens v Skyler Butts | 6-1,6-2 |
| ITF USA F10 | 2018/04/11 17:10 | Yannick Mertens v Michael Redlicki | 3-6,3-6 |
| ITF Singapore F3 | 2018/05/28 05:00 | Maverick Banes v Kazuki Nishiwaki | 6-7,6-4,7-6 |
| ITF Singapore F2 | 2018/05/25 03:00 | Kazuki Nishiwaki v Collin Altamirano | 7-5,2-6,3-6 |
| ITF Singapore F2 | 2018/05/24 04:55 | Kazuki Nishiwaki v Makoto Ochi | 6-2,7-5 |
| ITF Singapore F2 | 2018/05/23 06:25 | Kazuki Nishiwaki v Calum Puttergill | 6-3,7-6 |
| ITF Singapore F2 | 2018/05/22 02:00 | Jacob Grills v Kazuki Nishiwaki | 3-6,6-3,5-7 |
| ITF Singapore F2 | 2018/05/20 03:00 | Kazuki Nishiwaki v Ken Onoda | 6-1,6-2 |
| ITF Singapore F2 | 2018/05/19 02:00 | Kazuki Nishiwaki v Anthony Susanto | 6-0,6-1 |
| ITF Vietnam F2 | 2018/05/11 03:00 | Chun Hsin Tseng v Kazuki Nishiwaki | 6-3,3-6,6-3 |