Stadium: MTA 13 Round: 62 Ground: Clay
| ITF - M15 Antalya | 2021/04/11 07:00 | Graziani, Edoardo v Guttau, Niklas | 6-4,6-1 |
| ITF - M15 Antalya | 2021/04/06 07:00 | Guttau, Niklas v Graziani, Edoardo | 2-6,3-6 |
| ITF - M15 Antalya | 2021/04/05 07:00 | Guttau, Niklas v Tomas Lanik | 6-2,6-2 |
| ITF - M15 Antalya | 2021/04/04 06:30 | Guttau, Niklas v Michel Hopp | 6-1,6-3 |
| ITF - M15 Sharm El Sheikh | 2021/03/16 10:10 | Guttau, Niklas v Liu, Shao-Fan | 3-6,6-1,4-10 |
| ITF - M15 Sharm El Sheikh | 2021/03/15 11:30 | Guttau, Niklas v Lorenzo Rottoli | 6-3,6-1 |
| ITF - M15 Sharm El Sheikh | 2021/03/14 14:30 | Guttau, Niklas v Babji Siva Atturu | 6-0,6-2 |
| ITF - M15 Sharm El Sheikh | 2021/03/09 09:45 | Guttau, Niklas v Illya Beloborodko | 7-5,4-6,4-10 |
| ITF - M15 Antalya | 2021/04/16 10:00 | Kim, Cheong-Eui v Frunza, Nicolae | 0-6,2-6 |
| ITF - M15 Antalya | 2021/04/15 08:45 | Kim, Cheong-Eui v Graziani, Edoardo | 7-5,5-7,6-4 |
| ITF - M15 Antalya | 2021/04/14 08:55 | Marsel Ilhan v Kim, Cheong-Eui | 4-6,5-7 |
| ITF - M15 Antalya | 2021/04/13 07:00 | Kim, Cheong-Eui v Ovcharov, Alexander | 6-3,6-1 |
| ITF - M15 Antalya | 2021/04/12 09:00 | Kim, Cheong-Eui v de Rossi, Marco | 3-6,7-5,10-8 |
| ITF - M15 Antalya | 2021/04/11 07:00 | Kim, Cheong-Eui v Maurus Malgiaritta | 6-4,7-6 |
| ITF - M15 Antalya | 2021/04/07 08:50 | Kalovelonis, Markos v Kim, Cheong-Eui | 6-2,6-4 |
| ITF - M15 Antalya | 2021/04/06 07:00 | Kim, Cheong-Eui v Hellfritsch, Lucas | 6-7,6-2,10-7 |