Round: 60 Ground: Hardcourt outdoor
| ITF Portugal F2 Qual | 2018/02/25 10:00 | Amatiste, Gianmarco v Kaelin, Yanik | 2-6,3-6 |
| ITF Portugal F1 | 2018/02/19 10:00 | Ivanov, Simon Anthony v Kaelin, Yanik | 6-3,6-3 |
| ITF Portugal F1 | 2018/02/18 13:00 | Kaelin, Yanik v Hartmeier, Patrik | 7-6,6-3 |
| ITF Portugal F1 | 2018/02/17 12:30 | Diego A B Sanchez v Kaelin, Yanik | 1-6,1-6 |
| ITF Switzerland F1 Qual | 2018/02/04 09:00 | Michael Vrbensky v Kaelin, Yanik | 7-5,6-1 |
| ITF Tunisia F39 | 2017/12/10 08:00 | Berbegal Moreno, Alberto v Kaelin, Yanik | 6-2,6-1 |
| ITF Tunisia F39 | 2017/12/09 08:00 | Ben Abdallah, Skander v Kaelin, Yanik | 6-4,4-6,1-6 |
| ITF Tunisia F38 | 2017/12/04 08:30 | Benjamin Winter Lopez v Kaelin, Yanik | 6-1,7-6 |
| ITF Spain F5 | 2018/02/10 13:30 | Ivan Marrero Curbelo v Sergi Perez Contri | 6-3,2-6,1-6 |
| Spain F4, Singles Qualifying | 2018/02/05 09:00 | Fornell-Mestres, Marc v Ivan Marrero Curbelo | 6-1,2-6,6-2 |
| Spain F4, Singles Qualifying | 2018/02/04 10:30 | Hugounenq, Arthur v Ivan Marrero Curbelo | 1-6,1-6 |
| Spain F4, Singles Qualifying | 2018/02/03 14:30 | Pointon, Samuel v Ivan Marrero Curbelo | 3-6,0-6 |
| ITF Spain F3 | 2018/01/29 10:00 | Andrey Chepelev v Ivan Marrero Curbelo | 6-2,3-6,6-1 |
| ITF Spain F3 | 2018/01/27 12:00 | Cheruku, Vasisht v Ivan Marrero Curbelo | 6-4,3-6,6-7 |
| ITF Spain F2 | 2018/01/20 13:30 | Ivan Marrero Curbelo v Jonas Trinker | 7-6,4-6,3-6 |
| ITF Egypt F32 | 2017/11/01 17:15 | Andrzejczuk, Adrian v Ivan Marrero Curbelo | 6-7,6-2,6-2 |