Stadium: Ustron Centrum 2 Round: 44 Ground: Clay
| ITF Poland F3 | 2018/05/13 07:00 | Martin Fekiac v Sean Collins | 6-2,6-3 |
| ITF Portugal F3 | 2018/03/03 14:00 | Joel Cannell v Sean Collins | 6-1,6-1 |
| ITF Portugal F2 Qual | 2018/02/25 17:00 | Martim L Prata v Sean Collins | 6-4,6-4 |
| ITF Portugal F2 Qual | 2018/02/24 12:30 | Christopher Chien v Sean Collins | 2-6,1-6 |
| ITF Turkey F6 | 2018/02/10 06:00 | Simon Carr v Sean Collins | 6-1,6-0 |
| ITF Tunisia F36 | 2017/11/18 09:00 | Sean Collins v Lluis Dolz | 2-6,4-6 |
| ITF Ireland F2 | 2017/07/25 11:15 | Sean Collins v Osgar O'Hoisin | 2-6,3-6 |
| ITF Ireland F1 Qual | 2017/07/16 10:00 | Sean Hodkin v Sean Collins | 6-3,4-6,6-1 |