Stadium: Court 4 Round: 25 Ground: Hardcourt indoor
| ITF Sweden F4 | 2018/09/23 11:45 | Ruzgas, Marius v Simon Freund | 6-3,7-6 |
| ITF Latvia F1 | 2018/07/29 07:00 | Ruzgas, Marius v Pukshe, Teodors | 4-6,4-6 |
| ITF Lithuania F1 | 2018/07/22 08:00 | Solberg, Christoffer v Ruzgas, Marius | 6-4,6-1 |
| ITF Estonia F1 | 2018/07/16 07:00 | Eero Vasa v Ruzgas, Marius | 6-4,7-5 |
| Challenger Bastad Qual | 2018/07/07 12:00 | Robin Thour v Ruzgas, Marius | 6-2,7-6 |
| ITF Sweden F3 | 2018/05/23 10:35 | van Beem, Colin v Ruzgas, Marius | 6-4,7-5 |
| ITF Sweden F3 | 2018/05/21 09:50 | Nick Chappell v Ruzgas, Marius | 3-6,3-6 |
| ITF Sweden F2 Qual | 2018/05/13 11:55 | Mayer, Patrick v Ruzgas, Marius | 4-6,2-6 |
| ITF Korea F6 | 2018/08/31 06:00 | Lucas Catarina v Yeongseok Jeong | 3-6,6-2,6-2 |
| ITF Korea F6 | 2018/08/30 05:50 | Lucas Catarina v Kim, Seong Kwan | 6-2,6-4 |
| ITF Korea F6 | 2018/08/29 04:40 | Lucas Catarina v Yoo, Daniel | 6-2,7-6 |
| ITF Korea F5 | 2018/08/22 03:00 | Oh, Chan-Yeong v Lucas Catarina | 4-6,6-2,6-1 |
| ITF Korea F5 | 2018/08/21 03:00 | Kim, Jung Hoon 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 | Jomby, Tom v Lucas Catarina | 6-2,7-6 |
| Binghamton, USA | 2018/07/26 23:00 | Lucas Catarina v Granollers, Marcel | 2-6,4-6 |