Stadium: Court 2 Round: 44 Ground: Clay
| ITF M15 Oldenzaal | 2021/08/15 10:15 | Simonas Zukauskas v Lewie Lane | 3-6,2-6 |
| ITF M15 Gdyně | 2021/08/09 10:30 | Petr Hajek v Simonas Zukauskas | 6-0,6-1 |
| ITF M15 Gdyně | 2021/08/08 08:00 | Martins Rocens v Simonas Zukauskas | 6-4,5-7,8-10 |
| ITF M25 Vratislav | 2021/06/27 11:00 | Moritz Trocker v Simonas Zukauskas | 6-4,6-0 |
| ITF M15 Kouvola | 2021/05/27 11:25 | Luca Castelnuovo v Simonas Zukauskas | 6-1,6-3 |
| ITF M15 Kouvola | 2021/05/26 17:00 | August Ehrnrooth v Simonas Zukauskas | 6-7,6-4,6-7 |
| ITF M15 Kouvola | 2021/05/25 10:25 | Simonas Zukauskas v Leevi Saatela | 1-6,6-3,11-9 |
| ITF M15 Parnu | 2020/11/02 08:00 | Iiro Vasa v Simonas Zukauskas | 6-2,6-3 |
| ITF M15 Čornomorsk | 2021/08/29 09:30 | Igor Dudun v Kaya Arinc | 5-7,5-7 |
| ITF M15 - Antalya | 2021/06/29 14:20 | Kaya Arinc v Alex Barrena | 0-6,1-6 |
| ITF M15 - Antalya | 2021/06/20 07:00 | Kaya Arinc v Filip Duda | 0-6,4-6 |
| ITF M15 - Antalya | 2021/06/14 07:30 | Marsel Ilhan v Kaya Arinc | 6-1,7-6 |
| ITF M15 - Antalya | 2021/06/13 07:30 | Vladimir Cherkovets v Kaya Arinc | 0-6,1-6 |
| ITF M15 - Antalya | 2021/06/07 09:05 | Pawel Juszczak v Kaya Arinc | 6-3,6-2 |
| ITF M15 - Antalya | 2021/06/06 07:30 | Kaya Arinc v Daniil Savelev | 3-6,6-0,10-6 |
| ITF M15 - Antalya | 2021/05/30 07:30 | Kaya Arinc v Caspar Schuetze | 7-6,5-7,5-10 |