Estadio: Court 1 Round: 25 Ground: Hardcourt indoor
| Copa Davis | 2021/09/18 10:35 | Cem Ilkel v Ernests Gulbis | 6-4,6-1 |
| US Open | 2021/08/30 20:35 | Alex Molcan v Cem Ilkel | 4-6,6-3,6-1,6-1 |
| US Open | 2021/08/27 15:00 | Cem Ilkel v Jiri Lehecka | 7-6,6-3 |
| US Open | 2021/08/26 15:00 | Fernando Verdasco v Cem Ilkel | 6-4,3-6,4-6 |
| US Open | 2021/08/24 19:15 | Cedrik-Marcel Stebe v Cem Ilkel | 6-7,1-6 |
| Challenger de Segovia | 2021/07/29 11:50 | Nicolás Moreno de Alboran v Cem Ilkel | 6-4,6-0 |
| Challenger de Segovia | 2021/07/27 14:00 | Roberto Ortega-Olmedo v Cem Ilkel | 6-3,6-7,4-6 |
| Challenger de Pozoblanco | 2021/07/25 19:00 | Cem Ilkel v Altug Celikbilek | 1-6,7-6,3-6 |
| Challenger de Mallorca | 2021/09/02 19:25 | Frederico Ferreira Silva v Matteo Viola | 3-6,7-5,6-0 |
| Challenger de Mallorca | 2021/09/01 14:00 | Matteo Viola v Liam Broady | 6-4,3-6,6-4 |
| Challenger de Barletta | 2021/08/24 12:30 | Matteo Viola v Cristian Cristian Rodríguez | 2-6,5-7 |
| Challenger de Verona | 2021/08/17 16:10 | Nerman Fatic v Matteo Viola | 6-0,6-1 |
| Challenger de Segovia | 2021/07/28 10:00 | Matteo Viola v Benjamin Bonzi | 1-6,2-6 |
| Challenger de Segovia | 2021/07/27 08:00 | Mirza Basic v Matteo Viola | 4-6,1-6 |
| Challenger de Pozoblanco | 2021/07/22 17:20 | Matteo Viola v Emilio Nava | 5-7,6-4,3-6 |
| Challenger de Pozoblanco | 2021/07/20 17:10 | Matteo Viola v Thomaz Bellucci | 6-1,6-3 |