Stadium: Court C Round: 26 Ground: Clay
| ITF Czech Republic F3 | 2018/05/30 13:20 | Marek Jaloviec v Ondrej Styler | 6-4,6-3 |
| Challenger Loughborough | 2018/05/22 09:00 | Tim Puetz v Marek Jaloviec | 7-6,6-1 |
| ITF Poland F3 | 2018/05/19 12:30 | Marek Jaloviec v Marvin Netuschil | 5-7,6-7 |
| ITF Poland F3 | 2018/05/18 10:00 | Marek Jaloviec v Michal Dembek | 7-5,6-2 |
| ITF Poland F3 | 2018/05/15 07:30 | Marek Jaloviec v Martin Fekiac | 6-3,6-4 |
| Challenger - Glasgow | 2018/04/30 13:00 | Lloyd Glasspool v Marek Jaloviec | 6-3,6-2 |
| ITF Switzerland F2 | 2018/02/13 17:25 | Antoine Bellier v Marek Jaloviec | 6-4,6-4 |
| ITF Germany F2 | 2018/01/23 10:00 | Lukas Klein v Marek Jaloviec | 6-0,6-4 |
| ITF Hungary F3 | 2018/05/23 08:00 | Samuel Bensoussan v Ken Onishi | 6-1,6-4 |
| ITF Hungary F3 | 2018/05/22 11:20 | Ken Onishi v Matej Maruscak | 6-1,6-4 |
| ITF Bosnia and Herzegovina F1 | 2018/05/16 12:30 | Ken Onishi v Fran Zvonimir Zgombic | 6-2,3-6,4-6 |
| ITF Turkey F13 | 2018/04/01 08:30 | Ken Onishi v Gilbert S K Junior | 3-6,6-7 |
| ITF Turkey F13 | 2018/03/31 08:30 | Ken Onishi v Phongsapak Kerdlaphee | 6-4,6-2 |
| ITF Tunisia F9 | 2018/03/07 11:05 | Ken Onishi v Thomas Brechemier | 6-4,6-7,6-7 |
| ITF Tunisia F8 | 2018/02/28 11:20 | Anis Ghorbel v Ken Onishi | 6-4,1-6,6-2 |
| ITF Tunisia F7 | 2018/02/22 08:30 | Ken Onishi v Johan Sebastien Tatlot | 4-6,3-6 |