Stadium: Court 6 Round: 26 Ground: Hardcourt outdoor
| ITF Portugal F1 | 2018/02/20 11:45 | Mertens, Yannick v Bogajo Fernandez, Fernando | 7-6,6-1 |
| ITF Great Britain F3 | 2018/02/13 12:15 | Evan Furness v Mertens, Yannick | 4-6,7-5,6-4 |
| ITF Great Britain F1 | 2018/02/04 11:00 | Griekspoor, Scott v Mertens, Yannick | 6-1,7-6 |
| ITF Great Britain F1 | 2018/02/03 10:00 | Mertens, Yannick v Viola, Matteo | 7-6,6-1 |
| ITF Great Britain F1 | 2018/02/02 10:00 | Pauffley, Neil v Mertens, Yannick | 6-7,4-6 |
| ITF Great Britain F1 | 2018/02/01 13:40 | Rosenzweig, Nicolas v Mertens, Yannick | 0-6,6-3,4-6 |
| ITF Great Britain F1 | 2018/01/31 13:45 | Aidan Mchugh v Mertens, Yannick | 6-7,2-6 |
| ITF Egypt F2 | 2018/01/24 11:10 | Smirnov, Artem v Mertens, Yannick | 6-7,6-1,7-5 |
| ITF Portugal F1 | 2018/02/20 10:00 | Fermosell, Jaime v Bothwell, Peter | 6-3,6-4 |
| ITF Spain F5 | 2018/02/10 13:30 | Fermosell, Jaime v Canas Garcia, Juan Pablo | 2-6,1-6 |
| ITF Tunisia F1 | 2018/01/10 11:55 | Fermosell, Jaime v Romero de Avila Senise, Alberto | 2-6,0-6 |
| ITF Tunisia F31 | 2017/10/18 08:30 | Dougaz, Aziz v Fermosell, Jaime | 6-1,5-7,6-2 |
| ITF Spain F32 | 2017/10/02 08:00 | Fermosell, Jaime v Tashi, Vullnet | 2-6,0-6 |
| ITF Spain F29 | 2017/09/13 08:00 | Vilella Martinez, Mario v Fermosell, Jaime | 6-4,6-3 |
| ITF Spain F29 | 2017/09/12 08:00 | Fermosell, Jaime v Ivan Marrero Curbelo | 6-3,6-2 |
| ITF Spain F29 Qual | 2017/09/11 08:00 | Fermosell, Jaime v Mancineiras Cornella, Oscar | 6-4,6-3 |