Stadium: Court 6 Round: 44 Ground: Clay
| ITF Germany F4 | 2018/06/16 08:00 | Flinner, Marek v van Nieuwenhove, Jonathan | 6-7,4-6 |
| ITF Czech Republic F1 | 2018/05/13 10:00 | Dima, Dragos v Flinner, Marek | 6-3,6-2 |
| ITF Czech Republic F1 | 2018/05/12 09:00 | Flinner, Marek v Moerl, Benedict | 7-5,7-6 |
| ITF Italy F8 Qual | 2018/04/15 12:00 | Flinner, Marek v Andrea Guerrieri | 2-6,0-6 |
| ITF Italy F8 Qual | 2018/04/14 13:00 | Flinner, Marek v Aguilar, Federico Juan | 7-5,7-6 |
| ITF Egypt F13 | 2018/04/07 10:30 | Lenaerts, Yannick v Flinner, Marek | 6-4,3-6,6-4 |
| Egypt F12, Singles Qualifying | 2018/04/01 08:00 | Flinner, Marek v Saidkarimov, Saida' Lo | 7-5,5-7,0-6 |
| Egypt F12, Singles Qualifying | 2018/03/31 10:30 | Davanzo, Killian v Flinner, Marek | 6-7,2-6 |
| ITF Netherlands F5 | 2018/08/19 08:30 | Karlo Cubelic v Sandro Kopp | 2-6,7-5,6-3 |
| ITF Netherlands F5 | 2018/08/19 08:30 | Borg, Maikel v Karlo Cubelic | 6-3,6-4 |
| ITF Netherlands F5 | 2018/08/18 07:00 | Janezic, Dorian Tomaz v Karlo Cubelic | 1-6,2-6 |
| ITF Austria F5 Qual | 2018/07/30 08:00 | Umberto Maria Giovannini v Karlo Cubelic | 6-1,6-3 |
| ITF Austria F5 Qual | 2018/07/29 08:00 | Tino Kovacic v Karlo Cubelic | 4-6,2-6 |
| ITF Austria F5 Qual | 2018/07/28 07:00 | Michal Lusovsky v Karlo Cubelic | 3-6,6-4,6-7 |
| ITF Germany F9 | 2018/07/22 08:00 | Louroi Martinez v Karlo Cubelic | 6-3,7-5 |
| ITF Germany F8 Qual | 2018/07/16 15:35 | Davydenko, Philipp v Karlo Cubelic | 7-5,6-2 |