Stadium: Court 5 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2023/12/06 10:10 | Alexey Vatutin v Mark Wallner | 3-6,7-6,1-6 |
| ITF M15 Monastir | 2023/12/04 13:30 | Igor Kudriashov v Mark Wallner | 6-4,3-6,3-10 |
| ITF M15 Monastir | 2023/12/04 08:00 | Matei Cristian Onofrei v Mark Wallner | 2-6,3-6 |
| ITF M15 Monastir | 2023/12/03 10:30 | Leon Formella v Mark Wallner | 0-6,6-7 |
| ITF M25 Monastir | 2023/11/29 08:30 | Mark Wallner v Jakob Schnaitter | 1-6,0-6 |
| ITF M25 Monastir | 2023/11/27 13:00 | Mark Wallner v Federico Bove | 6-2,7-5 |
| ITF M25 Monastir | 2023/11/27 10:00 | Mark Wallner v Yanick Schneider | 6-0,6-1 |
| ITF M25 Monastir | 2023/11/22 13:55 | Robert Strombachs v Mark Wallner | 7-6,6-2 |
| ITF M15 Monastir | 2023/12/06 13:05 | Federico Bove v Filip Apltauer | 3-6,1-6 |
| ITF M15 Monastir | 2023/12/04 14:20 | Tiago Pereira v Filip Apltauer | 6-3,3-6,3-10 |
| ITF M15 Monastir | 2023/12/04 08:00 | Anas Ben Chiekh v Filip Apltauer | 2-6,0-6 |
| ITF M15 Ithaca | 2023/10/02 16:30 | Aleksa Ciric v Filip Apltauer | 7-6,6-2 |
| ITF M25 Champaign | 2023/09/11 15:00 | Filip Apltauer v Maxwell McKennon | 5-7,0-6 |
| UTR Pro Knoxville | 2023/09/02 14:30 | Nicolas Cortes Campos v Filip Apltauer | 3-6,0-1 |
| UTR Pro Knoxville | 2023/09/01 22:47 | Jibril Nettles v Filip Apltauer | 4-6,3-6 |
| UTR Pro Knoxville | 2023/08/31 19:30 | Sabi Roi v Filip Apltauer | 4-6,1-5 |