| Davise karikas | 02/02 12:30 | 26 | Adrian Mannarino v Thiemo De Bakker | 6-7,3-6,3-6 | |
| ITF Egypt F2 | 01/27 08:00 | 28 | Thiemo De Bakker v Aslan Karatsev | 6-7,4-6 | |
| ITF Egypt F2 | 01/26 08:00 | 27 | Karim-Mohamed Maamoun v Thiemo De Bakker | 5-7,5-7 | |
| ITF Egypt F2 | 01/25 08:00 | 26 | David Poljak v Thiemo De Bakker | 1-6,2-6 | |
| ITF Egypt F2 | 01/23 08:00 | 25 | Vladyslav Manafov v Thiemo De Bakker | 7-6,1-6,2-6 | |
| ITF Egypt F1 | 01/18 08:00 | 26 | Thiemo De Bakker v Roberto Marcora | 5-7,6-7 | |
| ITF Egypt F1 | 01/16 08:00 | 25 | Thiemo De Bakker v Issam Haitham Taweel | 6-2,6-4 | |
| ITF Egypt F30 | 10/18 18:10 | 25 | David Jorda Sanchis v Thiemo De Bakker | 3-6,6-4,6-1 | |
| ITF Egypt F29 | 10/15 14:30 | 29 | Gijs Brouwer v Thiemo De Bakker | 3-6,6-7 | |
| ITF Egypt F29 | 10/14 16:35 | 28 | [478] Antoine Escoffier v Thiemo De Bakker [422] | 2-6,3-6 | |
| ITF Egypt F29 | 10/13 14:00 | 27 | [432] Viktor Durasovic v Thiemo De Bakker [422] | 4-6,2-6 | |
| ITF Egypt F29 | 10/12 14:00 | 26 | Michiel de Krom v Thiemo De Bakker | 1-6,3-6 | |
| ITF Egypt F29 | 10/11 15:45 | 25 | Jose Fco. Vidal Azorin v Thiemo De Bakker | 5-7,4-6 | |
| Davise karikas | 09/17 12:25 | 26 | [408] Thiemo De Bakker v Lukas Rosol [192] | 3-6,6-4,6-4,6-4 | |
| Davise karikas | 09/15 12:00 | 26 | [408] Thiemo De Bakker v Jiri Vesely [59] | 6-4,3-6,6-4,4-6,4-6 | |
| Challenger Alphen | 09/07 18:35 | 26 | [374] Thiemo De Bakker v Yannick Maden [185] | 5-7,7-6,1-6 | |
| Challenger Alphen | 09/05 18:00 | 25 | [374] Thiemo De Bakker v Daniel Masur [259] | 6-4,6-4 | |
| ITF Netherlands F6 | 08/27 13:35 | 29 | Gijs Brouwer v Thiemo De Bakker | 2-6,3-6 | |
| ITF Netherlands F6 | 08/26 14:00 | 28 | Thiemo De Bakker v Tom Kocevar-Desman | 6-3,6-3 | |
| ITF Netherlands F6 | 08/25 15:15 | 27 | Scott Griekspoor v Thiemo De Bakker | 1-6,6-7 | |
| ITF Netherlands F6 | 08/24 16:00 | 26 | [497] Robin Stanek v Thiemo De Bakker [377] | 6-7,3-6 | |
| ITF Netherlands F6 | 08/22 16:00 | 25 | Tim Van Terheijden v Thiemo De Bakker | 5-7,6-3,3-6 | |
| ITF Netherlands F5 | 08/17 09:30 | 26 | Scott Griekspoor v Thiemo De Bakker | 6-4,1-6,6-4 | |
| ITF Netherlands F5 | 08/16 12:50 | 25 | Frederik Press v Thiemo De Bakker | 3-6,4-6 | |
| Challenger Scheveningen | 07/22 12:10 | 28 | [465] Thiemo De Bakker v Guillermo Garcia-Lopez [163] | Retired | |
| Challenger Scheveningen | 07/21 16:30 | 27 | [465] Thiemo De Bakker v Stefanos Tsitsipas [167] | 6-1,6-4 | |
| Challenger Scheveningen | 07/19 16:40 | 26 | [465] Thiemo De Bakker v Riccardo Bellotti [239] | 6-4,6-7,6-2 | |
| Challenger Scheveningen | 07/18 16:30 | 25 | [42] Robin Haase v Thiemo De Bakker [465] | 6-7,4-6 | |
| ITF Netherlands F4 | 07/12 16:15 | 25 | Petr Hajek v Thiemo De Bakker | Retired | |
| ITF Netherlands F4 | 07/12 06:30 | - | Petr Hajek v Thiemo De Bakker | 6-5 |