Stadium: Court 15 Round: 54 Ground: Hardcourt outdoor
| ITF Greece F8 | 2018/11/15 08:00 | Seifert, Stefan v Rapp, Austin | 0-6,2-6 |
| ITF Greece F8 | 2018/11/13 09:25 | Seifert, Stefan v Papavasiliou, Constantinos | 6-0,6-1 |
| ITF Germany F16 | 2018/10/25 12:45 | Seifert, Stefan v Tyurnev, Evgeny | 5-7,4-6 |
| ITF Germany F16 | 2018/10/24 10:00 | Dubrivnyy, Artem v Seifert, Stefan | 6-2,5-7,1-6 |
| ITF Germany F16 | 2018/10/23 13:00 | Seifert, Stefan v Willems, Johann | 4-6,6-3,6-2 |
| ITF Germany F15 | 2018/10/12 15:45 | Seifert, Stefan v Vadym Ursu | 3-6,1-6 |
| ITF Germany F15 | 2018/10/11 15:25 | Seifert, Stefan v Karlo Cubelic | 6-4,6-7,6-2 |
| ITF Germany F15 | 2018/10/10 16:45 | Seifert, Stefan v Galus, Piotr | 6-1,6-2 |
| Dublin, Singles Qualifying M-ITF-IRL-01A | 2019/07/29 09:00 | Jhun, Alexander v Millen Hurrion | 6-1,3-6,12-14 |
| ITF M15 Cancun | 2019/07/11 13:30 | Jhun, Alexander v Mendoza, Alejandro | 1-6,6-2,3-6 |
| ITF M15 Cancun | 2019/07/10 13:30 | Acob, Zandrix v Jhun, Alexander | 3-6,6-3,4-6 |
| ITF M15 Cancun | 2019/07/02 15:00 | Jhun, Alexander v Lebedev, Alexander | 1-6,4-6 |
| ITF M15 Cancun | 2019/06/26 15:30 | Batalla Diez, Juan Ignacio v Jhun, Alexander | 1-6,6-2,6-3 |
| ITF - M15 Héraklion | 2019/05/22 13:15 | Pervolarakis, Michail v Jhun, Alexander | 6-2,6-1 |
| ITF - M15 Héraklion | 2019/05/21 07:00 | Boyer, Toby D v Jhun, Alexander | 2-6,6-3,10-5 |
| ITF - M15 Héraklion | 2019/05/20 12:30 | Ioannis Xilas v Jhun, Alexander | 3-6,0-6 |