Stadium: Court Central Round: 26 Ground: Clay
| 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 |
| Challenger - Glasgow | 2018/05/02 11:40 | Mertens, Yannick v Hiroki Moriya | 4-6,6-3,6-7 |
| ITF France F13 | 2018/07/10 07:30 | Lakat, Florian v Tchoutakian, Maxime | 7-5,7-6 |
| ITF Spain F17 | 2018/07/03 12:15 | Viktor Durasovic v Lakat, Florian | 6-1,6-3 |
| ITF Spain F14 | 2018/06/05 13:00 | Lakat, Florian v Guttierrez-Ferrol, Sergio | 0-6,1-6 |
| ITF USA F10 | 2018/04/11 18:45 | Hu, Nicholas S v Lakat, Florian | 6-4,5-7,6-3 |
| ITF USA F9 Qual | 2018/04/02 14:00 | Lakat, Florian v Findel-Hawkins, Jack | 4-6,0-6 |
| ITF USA F9 Qual | 2018/04/01 16:30 | Lakat, Florian v Shabaz, Michael | 7-6,4-6,6-4 |
| ITF USA F9 Qual | 2018/03/31 14:00 | Lakat, Florian v Daciek, Patrick | 6-7,6-2,6-3 |
| ITF USA F8 Qual | 2018/03/17 17:00 | Vlad Andrei Dancu v Lakat, Florian | 6-2,4-6,6-4 |