Round: 44 Ground: Hardcourt outdoor
| Waco, Singles M-ITF-USA-41A | 2019/10/13 20:00 | Finn Bass v Zsiga, Mate | 5-7,0-6 |
| ITF M25 Norman | 2019/10/02 15:00 | Evan Zhu v Zsiga, Mate | 6-3,6-2 |
| ITF M25 Norman | 2019/10/01 15:00 | Roelofse, Ruan v Zsiga, Mate | 1-6,6-4,4-10 |
| ITF M25 Norman | 2019/09/30 15:00 | Zsiga, Mate v Hamilton, Grey | 6-4,7-5 |
| ITF M25 Norman | 2019/09/29 15:00 | Zsiga, Mate v Zielinski, Przemyslaw | 6-3,6-1 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2019/06/20 18:40 | Redlicki, Martin v Zsiga, Mate | 6-3,7-6 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2019/06/19 16:30 | Zsiga, Mate v Saraiva, Bernardo | 6-4,6-3 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2019/06/18 15:00 | Hiltzik, Aron v Zsiga, Mate | 4-6,7-6,4-10 |
| Waco, Singles M-ITF-USA-41A | 2019/10/13 20:00 | Smith, Barnaby v Smith, Logan | 6-2,6-1 |
| ITF M25 Roehampton | 2019/07/29 11:45 | Smith, Barnaby v Jacob Fearnley | 4-6,6-4,6-10 |
| ITF M15 Parnu | 2019/07/15 13:00 | Smith, Barnaby v Adrian Oetzbach | 3-6,2-6 |
| ITF M15 Parnu | 2019/07/15 07:00 | Smith, Barnaby v Seeman, Johannes | 6-4,3-6,10-1 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/06/24 08:00 | Tristan Boyer v Smith, Barnaby | 6-2,6-3 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/06/17 09:00 | Vernier, Michel v Smith, Barnaby | 6-3,6-4 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/06/10 13:00 | Guido Ivan Justo v Smith, Barnaby | 6-4,6-7,12-10 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/06/10 08:00 | Hans Albert Schubert v Smith, Barnaby | 0-6,0-6 |