Stadium: Court 4 Round: 54 Ground: Clay
| ITF M15 Uslar | 2023/07/17 08:00 | Karlo Cubelic v Aaron James Williams | 6-7,6-4,6-10 |
| ITF M25 Kassel | 2023/07/10 09:45 | Michael Agwi v Aaron James Williams | 5-7,6-4,10-8 |
| ITF M25 The Hague | 2023/07/02 08:00 | Wojcik, Jakub v Aaron James Williams | 7-6,5-7,11-9 |
| ITF M15 Kamen | 2023/06/26 08:00 | Lambert Ruland v Aaron James Williams | 6-4,6-2 |
| Saarlouis, Singles Qualifying M-ITF-GER-07A | 2023/06/18 09:00 | Milan Welte v Aaron James Williams | 6-4,7-6 |
| ITF M15 Duffel | 2023/06/11 11:00 | Aaron James Williams v Lodewijk Weststrate | 2-6,7-6,5-10 |
| German Championship | 2022/12/08 16:00 | Tim Handel v Aaron James Williams | 6-7,7-5,6-1 |
| German Championship | 2022/12/07 13:00 | Aaron James Williams v Thorsten Bertsch | 6-0,5-2 |
| ITF M15 Tehran | 2023/06/15 06:30 | Denis Klok v Galfinger, Rostislav | 6-1,6-2 |
| ITF M15 Tehran | 2023/06/14 06:30 | Galfinger, Rostislav v Jagmeet Singh | 6-1,6-2 |
| ITF M15 Tehran | 2023/06/13 08:30 | Galfinger, Rostislav v Kaya Arinc | 6-3,6-3 |
| ITF M15 Tehran | 2023/06/11 09:30 | Mousa Alkotop v Galfinger, Rostislav | 2-6,5-7 |
| UTR Pro Tennis Series Newport Beach | 2022/10/04 20:08 | Ventre, Alessandro-Damiano v Galfinger, Rostislav | 6-1,6-1 |
| UTR Pro Tennis Series Newport Beach | 2022/10/03 19:40 | Galfinger, Rostislav v Matteo Antonescu | 2-6,3-6 |
| UTR Pro Tennis Series Barcelona | 2022/07/12 06:00 | Bianchi, Nicolas v Galfinger, Rostislav | 6-1,6-1 |
| UTR Pro Tennis Series Barcelona | 2022/07/10 12:00 | Galfinger, Rostislav v Muniz Hidalgo, Antonio | 1-6,2-6 |