Round: 44 Ground: Clay
| ITF Grecia F3 | 2018/03/10 07:30 | Marek Flinner v Andrea Guerrieri | 6-3,3-6,6-1 |
| ITF Italia F8 - Qual. | 2018/04/14 13:00 | Marek Flinner v Federico Juan Aguilar | 7-5,7-6 |
| ITF Egitto F13 | 2018/04/07 10:30 | Yannick Lenaerts v Marek Flinner | 6-4,3-6,6-4 |
| ITF Egitto F12 | 2018/04/01 08:00 | Marek Flinner v Saida'lo Saidkarimov | 7-5,5-7,0-6 |
| ITF Egitto F12 | 2018/03/31 10:30 | Killian Davanzo v Marek Flinner | 6-7,2-6 |
| ITF Grecia F3 | 2018/03/11 08:00 | Leevi Saatela v Marek Flinner | 1-6,7-6,6-4 |
| ITF Grecia F3 | 2018/03/10 07:30 | Marek Flinner v Andrea Guerrieri | 6-3,3-6,6-1 |
| ITF Germania F16 | 2017/10/22 08:00 | Marek Flinner v Alexander Kuerschner | 3-6,2-6 |
| ITF Francia F22 - Qual. | 2017/09/30 13:40 | Kyrian Jacquet v Marek Flinner | 6-2,6-3 |
| Challenger Barletta Qual. | 2018/04/07 12:55 | Andrea Guerrieri v Kimmer Coppejans | 4-6,1-6 |
| ITF Italia F5 | 2018/03/28 11:55 | Lenny Hampel v Andrea Guerrieri | 6-3,6-1 |
| ITF Grecia F3 | 2018/03/10 07:30 | Marek Flinner v Andrea Guerrieri | 6-3,3-6,6-1 |
| ITF Grecia F2 | 2018/03/06 12:25 | Jakob Sude v Andrea Guerrieri | 6-4,6-3 |
| ITF Grecia F1 | 2018/02/28 11:00 | Andrea Guerrieri v Ljubomir Celebic | 4-6,0-6 |
| ITF Grecia F1 | 2018/02/26 08:00 | Andrea Guerrieri v Athanassios Manekas | 2-6,6-1,6-2 |
| ITF Tunisia F6 | 2018/02/12 10:45 | Diego Hidalgo v Andrea Guerrieri | 6-2,4-6,6-1 |
| ITF Tunisia F5 | 2018/02/05 08:00 | Lukas Vejvara v Andrea Guerrieri | 6-3,6-2 |