Stadium: Court 4 Round: 25 Ground: Hardcourt indoor
| ITF Latvia F1 | 2018/07/29 07:00 | Marius Ruzgas v Teodors Pukshe | 4-6,4-6 |
| ITF Lithuania F1 | 2018/07/22 08:00 | Christoffer Solberg v Marius Ruzgas | 6-4,6-1 |
| ITF Estonia F1 | 2018/07/16 07:00 | Eero Vasa v Marius Ruzgas | 6-4,7-5 |
| Challenger Bastad Qual | 2018/07/07 12:00 | Robin Thour v Marius Ruzgas | 6-2,7-6 |
| ITF Sweden F3 | 2018/05/23 10:35 | Colin Van Beem v Marius Ruzgas | 6-4,7-5 |
| ITF Sweden F3 | 2018/05/21 09:50 | Nick Chappell v Marius Ruzgas | 3-6,3-6 |
| ITF Sweden F2 Qual | 2018/05/13 11:55 | Patrick Mayer v Marius Ruzgas | 4-6,2-6 |
| ITF Sweden F1 | 2018/05/07 09:30 | Otto Virtanen v Marius Ruzgas | 6-1,6-2 |
| ITF Korea F5 | 2018/08/22 03:00 | Chan-Yeong Oh v Lucas Catarina | 4-6,6-2,6-1 |
| ITF Korea F5 | 2018/08/21 03:00 | Jung Hoon Kim v Lucas Catarina | 0-6,2-6 |
| Challenger Gwangju | 2018/08/13 08:40 | Lucas Catarina v Makoto Ochi | 3-6,2-6 |
| Challenger Lexington | 2018/07/31 01:45 | Tom Jomby v Lucas Catarina | 6-2,7-6 |
| Challenger Binghamton | 2018/07/26 23:00 | Lucas Catarina v Marcel Granollers | 2-6,4-6 |
| Challenger Binghamton | 2018/07/26 15:45 | William Blumberg v Lucas Catarina | 4-6,6-2,4-6 |
| Challenger Gatineau Qual | 2018/07/15 20:00 | Lucas Catarina v Justin Boulais | 6-0,5-7,6-7 |
| Challenger Gatineau Qual | 2018/07/15 02:00 | Lucas Catarina v Kento Takeuchi | 6-3,6-3 |