stadio: Court 3 Round: 19 Ground: Clay
| Challenger Oeiras - Qual. | 2021/04/04 10:00 | Kaichi Uchida v Filip Cristian Jianu | 2-6,5-7 |
| Challenger Lilla | 2021/03/25 09:30 | Maxime Janvier v Filip Cristian Jianu | 6-7,6-3,6-3 |
| Challenger Lilla | 2021/03/24 09:30 | Filip Cristian Jianu v Alexandre Muller | 2-6,6-2,7-5 |
| Challenger Lilla | 2021/03/22 12:05 | Baptiste Crepatte v Filip Cristian Jianu | 6-2,6-1 |
| Challenger Lilla | 2021/03/21 15:15 | Martin Breysach v Filip Cristian Jianu | 3-6,3-6 |
| Challenger Gran Canaria | 2021/03/02 11:40 | Carlos Alcaraz Garfia v Filip Cristian Jianu | 6-3,6-7,6-1 |
| Challenger Gran Canaria | 2021/03/01 11:00 | Filip Cristian Jianu v Sadio Doumbia | 6-2,6-3 |
| Challenger Gran Canaria - Qual. | 2021/02/28 16:05 | Filip Cristian Jianu v Ivan Marrero Curbelo | 5-7,6-3,6-2 |
| Challenger Oeiras - Qual. | 2021/04/04 11:30 | Eduard Esteve Lobato v Adrian Andreev | 3-6,4-6 |
| ITF M25 Biel | 2021/03/30 13:50 | Adrian Andreev v Tim Van Rijthoven | 3-6,1-6 |
| Challenger Lilla | 2021/03/21 09:00 | Adrian Andreev v Christopher Heyman | 4-6,6-3,3-6 |
| Coppa Davis | 2021/03/05 15:10 | Adrian Andreev v Gerardo L Villasenor | 6-3,1-6,2-6 |
| ATP Singapore | 2021/02/24 11:10 | Adrian Andreev v Alexei Popyrin | 1-6,7-5,3-6 |
| ATP Singapore | 2021/02/22 06:20 | Lloyd Harris v Adrian Andreev | 6-1,3-6,4-6 |
| Challenger Biella | 2021/02/09 10:10 | Adrian Andreev v Matthias Bachinger | 2-6,5-7 |
| ITF M15 Antalya | 2021/01/17 09:00 | Adrian Andreev v Alexander Shevchenko | 6-1,7-6 |