Stadion: Court 1 Round: 25 Ground: Clay
| Challenger - Iasi | 2021/07/12 08:00 | Bogdan Bobrov v Dan Alexandru Tomescu | 2-6,3-6 |
| Challenger - Iasi | 2021/07/11 09:30 | Dan Alexandru Tomescu v Mathieu Perchicot | 6-3,6-4 |
| ITF - M15 - Genua | 2021/06/14 07:00 | Pascal Meis v Dan Alexandru Tomescu | 7-5,6-4 |
| ITF - M15 - Antalya | 2021/06/02 09:15 | Dan Alexandru Tomescu v Matteo Gigante | 6-7,2-6 |
| ITF - M15 - Bukarest | 2021/05/25 16:00 | Mathieu Perchicot v Dan Alexandru Tomescu | 6-3,7-6 |
| UTR Pro Tennis Series - Bukarest | 2021/05/22 09:35 | Stefan Palosi v Dan Alexandru Tomescu | 2-6,5-7 |
| UTR Pro Tennis Series - Bukarest | 2021/05/21 17:00 | George Botezan v Dan Alexandru Tomescu | 6-4,6-2 |
| UTR Pro Tennis Series - Bukarest | 2021/05/21 10:00 | Vlad Andrei Dancu v Dan Alexandru Tomescu | 4-6,5-7 |
| Challenger - Salzburg | 2021/07/05 09:00 | Jiri Lehecka v Filip Cristian Jianu | 7-5,6-4 |
| Challenger - Salzburg | 2021/07/04 08:00 | Miljan Zekic v Filip Cristian Jianu | 6-7,3-6 |
| ATP - Eastbourne | 2021/06/19 14:20 | Filip Cristian Jianu v James Duckworth | 4-6,3-6 |
| Challenger - Almaty | 2021/06/16 06:00 | Riccardo Bonadio v Filip Cristian Jianu | 6-1,7-6 |
| Challenger - Almaty | 2021/06/15 04:00 | Tung-Lin Wu v Filip Cristian Jianu | 4-6,5-7 |
| Challenger - Almaty | 2021/06/14 04:00 | Filip Cristian Jianu v Vladyslav Orlov | 6-7,1-6 |
| Challenger - Almaty - Qualifikation | 2021/06/13 08:00 | Filip Cristian Jianu v Danil Ozernoy | 6-2,6-1 |
| Challenger - Almaty | 2021/06/10 05:30 | Filip Cristian Jianu v Dmitry Popko | 5-7,3-6 |