Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Jakarta | 2023/06/21 02:00 | Anthony Susanto v Thiemo De Bakker | 4-6,3-6 |
| ITF M15 Meerbusch | 2023/04/26 16:00 | Thiemo De Bakker v Tim Handel | 6-3,6-7,4-6 |
| ITF M25 Palmanova | 2023/03/22 11:30 | Pablo Llamas Ruiz v Thiemo De Bakker | 6-3,7-5 |
| ITF M25 Palmanova | 2023/03/16 08:30 | Alex M Pujolras v Thiemo De Bakker | 6-1,6-3 |
| ITF M25 Palmanova | 2023/03/15 09:55 | Gabriele Piraino v Thiemo De Bakker | 4-6,6-7 |
| ITF M15 Porec | 2023/03/08 14:30 | Thiemo De Bakker v Damien Wenger | 6-1,4-6,3-6 |
| ITF M25 Nussloch | 2023/01/25 18:35 | Thiemo De Bakker v Dominik Recek | 3-6,4-6 |
| ITF M25 Santa Margherita | 2019/09/22 12:00 | Lucas Gerch v Thiemo De Bakker | 2-6,4-6 |
| ITF M15 Jakarta | 2023/06/21 04:25 | Tegar A S Wibowo v Shuichi Sekiguchi | 0-6,0-6 |
| ITF M25 Kashiwa | 2023/04/05 04:30 | Shuichi Sekiguchi v Tatsuma Ito | 4-6,6-3,7-5 |
| ITF M25 Lucknow | 2023/03/22 04:00 | Shuichi Sekiguchi v Karan Singh | 3-6,4-6 |
| ITF M25 New Delhi | 2023/03/16 05:30 | Yunseok Jang v Shuichi Sekiguchi | 2-6,7-5,6-3 |
| ITF M25 New Delhi | 2023/03/15 09:55 | Woobin Shin v Shuichi Sekiguchi | 7-5,5-7,3-6 |
| ITF M15 Aktobe | 2023/03/02 09:25 | Federico Bertuccioli v Shuichi Sekiguchi | 7-6,4-6,4-4 |
| ITF M15 Aktobe | 2023/03/01 09:55 | Adrian Oetzbach v Shuichi Sekiguchi | 3-6,4-6 |
| ITF M25 Burnie | 2023/02/09 00:50 | Adam Walton v Shuichi Sekiguchi | 6-1,6-7,7-6 |