Stadium: Court 3 Round: 26 Ground: Clay
| ITF M15 Uberlingen | 2023/08/16 08:00 | Gregor Ramskogler v Mark Wallner | 3-6,2-6 |
| ITF M15 Uberlingen | 2023/08/14 08:00 | Daniel L Salmeron v Mark Wallner | 1-6,6-7 |
| ITF M15 Frankfurt Am Main | 2023/08/07 16:00 | Gregor Ramskogler v Mark Wallner | 6-4,7-5 |
| ITF M15 Frankfurt Am Main | 2023/08/07 10:00 | Mark Wallner v Giuseppe La Vela | 6-4,7-5 |
| ITF M15 Celje | 2023/06/27 07:00 | Gian Marco Ortenzi v Mark Wallner | 6-4,6-4 |
| ITF M15 Celje | 2023/06/26 11:40 | Mark Wallner v Alexander Klintcharov | 6-2,7-6 |
| ITF M15 Litija | 2023/06/12 07:00 | Corey Gaal v Mark Wallner | 3-6,6-3,12-10 |
| ITF M25 Jablonec Nad Nisou | 2023/05/29 08:00 | Luca Wiedenmann v Mark Wallner | 6-4,6-3 |
| ITF M15 Uberlingen | 2023/08/16 10:50 | Fnu Nidunjianzan v Tom Gentzsch | 6-4,4-6,6-4 |
| ITF M15 Pescara | 2023/08/09 10:30 | Luciano Carraro v Fnu Nidunjianzan | 4-6,6-4,6-4 |
| ITF M15 Pescara | 2023/08/08 08:00 | Fnu Nidunjianzan v Davide Galoppini | 5-7,6-4,7-5 |
| ITF M15 Xativa | 2023/08/03 15:00 | Fnu Nidunjianzan v Sergio Callejon Hernando | 3-6,3-6 |
| ITF M15 Xativa | 2023/08/02 19:25 | Fnu Nidunjianzan v Ignacio Parisca | 6-1,6-4 |
| ITF M15 Huntsville | 2023/05/28 16:45 | Roberto Cid Subervi v Fnu Nidunjianzan | 5-7,3-6 |
| ITF M15 Huntsville | 2023/05/27 16:00 | Fnu Nidunjianzan v Blaise Bicknell | 2-6,7-6,6-1 |
| ITF M15 Huntsville | 2023/05/25 16:45 | Lorenzo Esquici v Fnu Nidunjianzan | 6-2,4-6,3-6 |