Stadium: Court 3 Round: 25 Ground: Clay
| ITF M25 Kassel | 2023/07/12 11:35 | Tom Gentzsch v Aldin Setkic | 4-6,2-6 |
| ITF M25 Marburg | 2023/07/06 10:35 | Alex Rybakov v Tom Gentzsch | 6-7,6-3,6-2 |
| ITF M15 Kamen | 2023/07/01 12:40 | Hynek Barton v Tom Gentzsch | 7-6,7-5 |
| ITF M15 Kamen | 2023/06/29 08:50 | Tom Gentzsch v Marc Majdandzic | 6-3,4-6,7-6 |
| ITF M15 Kamen | 2023/06/27 09:55 | Tom Gentzsch v Illya Beloborodko | 6-3,6-4 |
| ITF M15 Saarlouis | 2023/06/22 11:10 | Tom Gentzsch v Jeffrey Von Der Schulenburg | 4-6,3-6 |
| ITF M15 Saarlouis | 2023/06/21 16:25 | Luca Staeheli v Tom Gentzsch | 6-4,3-6,2-6 |
| ITF M15 Monastir | 2023/06/13 09:40 | Gilbert S K Junior v Tom Gentzsch | 6-3,6-4 |
| ITF M15 Metzingen | 2023/07/24 12:00 | Louroi Martinez v Gian Luca Tanner | 1-6,4-6 |
| ITF M15 Metzingen | 2023/07/23 12:00 | Gian Luca Tanner v Noah Schlagenhauf | 2-6,6-1,10-3 |
| ITF M25 Klosters | 2023/07/05 15:05 | Benjamin Lock v Gian Luca Tanner | 6-2,2-6,6-4 |
| ITF M25 Klosters | 2023/07/03 12:45 | Gian Luca Tanner v Raffael Schaer | 7-5,6-0 |
| ITF M25 Klosters | 2023/07/02 14:50 | Lawrence Bataljin v Gian Luca Tanner | 1-6,2-6 |
| ITF M25 Bourg-en-Bresse | 2023/06/28 16:00 | Gian Luca Tanner v Alex M Pujolras | 1-6,2-6 |
| ITF M25 Bourg-en-Bresse | 2023/06/26 10:55 | Gian Luca Tanner v Raphael Vaksmann | 6-3,6-1 |
| ITF M25 Bourg-en-Bresse | 2023/06/25 12:35 | Yann Wojcik v Gian Luca Tanner | 4-6,6-7 |