Stadium: Court 5 Round: 26 Ground: Clay
| Hungary F6, Singles | 2018/08/21 15:45 | Doumbia, Sadio v Keki, Mark | 6-1,6-3 |
| Challenger Portoroz Qual | 2018/08/05 13:00 | Karatsev, Aslan v Doumbia, Sadio | 6-4,6-3 |
| Challenger Portoroz Qual | 2018/08/04 13:30 | Anton Chekhov v Doumbia, Sadio | 0-6,2-6 |
| Segovia, Spain | 2018/07/31 12:55 | Nam Hoang Ly v Doumbia, Sadio | 6-2,6-1 |
| Challenger Segovia Qual | 2018/07/30 12:35 | Doumbia, Sadio v Nam Hoang Ly | 5-7,2-6 |
| Challenger Segovia Qual | 2018/07/29 15:55 | Doumbia, Sadio v Blanco Guadalupe, Jorge | 6-2,6-4 |
| Challenger Segovia Qual | 2018/07/28 13:00 | Perez Sanz, David v Doumbia, Sadio | 4-6,2-6 |
| Challenger Prague | 2018/07/21 08:00 | Doumbia, Sadio v Vadym Ursu | 7-6,4-6,4-6 |
| Hungary F6, Singles | 2018/08/21 11:30 | Nagy, Peter v Szintai, David | 6-2,6-3 |
| ITF Serbia F2 | 2018/08/18 09:45 | Ergi Kirkin v Nagy, Peter | 2-6,6-2,7-5 |
| ITF Serbia F2 | 2018/08/17 08:00 | Nagy, Peter v Tikhomirov, Maksim | 7-5,6-1 |
| ITF Serbia F2 | 2018/08/16 08:00 | Nagy, Peter v Durguti, Besir | 6-4,6-2 |
| ITF Serbia F2 | 2018/08/14 09:40 | Nagy, Peter v Zarkovic, Bodin | 6-3,6-3 |
| ITF Serbia F1 | 2018/08/10 08:00 | Roncalli, Simone v Nagy, Peter | 6-3,6-0 |
| ITF Serbia F1 | 2018/08/09 08:00 | Milan Drinic v Nagy, Peter | 5-7,4-6 |
| ITF Serbia F1 | 2018/08/08 08:00 | Malesevic, Nemanja v Nagy, Peter | 4-6,3-6 |