Stadium: Pista 2 Round: 27 Ground: Hardcourt outdoor
| French Open | 2021/05/25 16:00 | Cem Ilkel v Mohamed Safwat | 4-6,4-6 |
| Challenger Biella | 2021/05/17 12:50 | Cem Ilkel v Bjorn Fratangelo | 2-6,4-6 |
| Challenger Rome | 2021/05/01 13:00 | Cem Ilkel v Flavio Cobolli | 3-6,5-7 |
| Challenger Rome | 2021/04/30 14:40 | Nino Serdarusic v Cem Ilkel | 6-7,6-3,3-6 |
| Challenger Rome | 2021/04/29 14:40 | Cem Ilkel v Lorenzo Giustino | 6-4,6-2 |
| Challenger Rome | 2021/04/27 11:30 | Daniel Masur v Cem Ilkel | 6-4,4-6,6-7 |
| Challenger Split | 2021/04/16 09:00 | Elias Ymer v Cem Ilkel | 6-3,6-4 |
| Challenger Split | 2021/04/14 10:15 | Cem Ilkel v Hugo Gaston | 2-6,6-3,7-6 |
| Challenger Oeiras | 2021/05/24 14:45 | Holger Rune v Tim Van Rijthoven | 6-3,6-4 |
| Challenger Biella | 2021/05/19 11:45 | Enzo Couacaud v Tim Van Rijthoven | 7-6,5-7,6-2 |
| Challenger Biella | 2021/05/18 10:20 | Tim Van Rijthoven v Omar Giacalone | 6-2,6-2 |
| Challenger Biella | 2021/05/17 11:00 | Viktor Galovic v Tim Van Rijthoven | 6-7,3-6 |
| Challenger Biella | 2021/05/16 12:50 | Cristian Rodriguez v Tim Van Rijthoven | 6-7,6-7 |
| Challenger Salinas 2 | 2021/04/29 17:10 | Tim Van Rijthoven v Nicolas Jarry | 3-6,5-7 |
| Challenger Salinas 2 | 2021/04/27 17:50 | Roberto Ortega-Olmedo v Tim Van Rijthoven | 6-7,7-6,6-7 |
| Challenger Salinas | 2021/04/23 15:00 | Tim Van Rijthoven v Altug Celikbilek | 3-6,6-2,6-7 |