Stadium: Court 1 Round: 46 Ground: Clay
| Challenger Caltanissetta | 2014/06/13 11:30 | Delic, Mate v Souza, Joao Olavo | 4-6,2-6 |
| Genoa, Italy | 2018/09/02 13:05 | Gianluca Mager v Souza, Joao Olavo | 4-6,4-6 |
| ITF Italy F22 | 2018/08/10 12:40 | Rondoni, Pietro v Souza, Joao Olavo | 6-3,6-7,6-1 |
| ITF Italy F22 | 2018/08/09 15:30 | Elmar Ejupovic v Souza, Joao Olavo | 3-6,4-6 |
| ITF Italy F22 | 2018/08/08 14:30 | Riccardo Bonadio v Souza, Joao Olavo | 6-7,6-4,0-6 |
| ITF Italy F22 | 2018/08/07 15:15 | Santanna, B. v Souza, Joao Olavo | 4-6,2-6 |
| ITF Italy F21 | 2018/08/04 08:30 | Tomas Martin Etcheverry v Souza, Joao Olavo | 6-7,4-6 |
| ITF Italy F21 | 2018/08/03 14:30 | Souza, Joao Olavo v Simon, Tobias | 7-6,7-6 |
| ITF Italy F21 | 2018/08/02 18:40 | Sorgi, Joao Pedro v Souza, Joao Olavo | 4-6,5-7 |
| Genoa, Italy | 2018/09/02 14:20 | Delic, Mate v Massimino, Manuel | 6-4,6-1 |
| Challenger Portoroz Qual | 2018/08/05 08:00 | Albano Olivetti v Delic, Mate | 6-4,7-6 |
| Challenger Liberec Qual | 2018/07/28 08:00 | Delic, Mate v Marvin Moeller | 3-6,1-6 |
| Challenger Perugia Qual | 2018/07/09 08:00 | Pavic, Ante v Delic, Mate | 6-2,6-4 |
| Challenger Perugia Qual | 2018/07/08 09:40 | Juan Pablo Varillas v Delic, Mate | 6-4,3-6,5-7 |
| ITF Bosnia and Herzegovina F1 | 2018/05/18 08:00 | Nerman Fatic v Delic, Mate | 6-2,6-3 |
| ITF Bosnia and Herzegovina F1 | 2018/05/17 09:45 | Hajek, Petr v Delic, Mate | 6-7,5-7 |
| ITF Bosnia and Herzegovina F1 | 2018/05/16 09:00 | Valentin Vanta v Delic, Mate | 0-6,1-6 |