Stadium: Hard 20 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/11/19 09:35 | Filip Cristian Jianu v Lukas Krainer | 6-2,5-7,6-2 |
| ITF M15 Heraklion | 2021/11/18 07:00 | Preston Brown v Lukas Krainer | 6-3,1-6,2-6 |
| ITF M15 Heraklion | 2021/11/17 07:00 | Alec Deckers v Lukas Krainer | 5-7,6-7 |
| ITF M15 Sharm El Sheikh | 2021/11/03 10:10 | Erik Arutiunian v Lukas Krainer | 6-3,6-4 |
| ITF M15 Sharm El Sheikh | 2021/10/28 08:00 | Menelaos Efstathiou v Lukas Krainer | 6-3,5-7,6-4 |
| ITF M15 Sharm El Sheikh | 2021/10/27 09:25 | Saba Purtseladze v Lukas Krainer | 3-6,5-7 |
| ITF M15 Sharm El Sheikh | 2021/10/24 08:00 | Hady Habib v Lukas Krainer | 6-2,6-4 |
| ITF M15 Sharm El Sheikh | 2021/10/23 08:00 | Simone Roncalli v Lukas Krainer | 6-4,4-6,0-6 |
| ITF M15 Heraklion | 2021/11/16 07:00 | Uisung Park v Nikolay Nedelchev | 6-4,6-2 |
| ITF M15 Heraklion | 2021/11/15 08:00 | Uisung Park v Charles Tzicas | 6-2,6-3 |
| ITF M15 Heraklion | 2021/11/14 09:30 | Uisung Park v Pavlos Tsitsipas | 6-1,6-1 |
| ITF M15 Heraklion | 2021/11/09 08:30 | Matthew Romios v Uisung Park | 6-4,6-1 |
| ITF M15 Monastir | 2021/06/26 08:30 | Uisung Park v Luciano Darderi | 3-6,4-6 |
| ITF M15 Monastir | 2021/06/25 08:30 | Uisung Park v Moez Echargui | 6-4,6-2 |
| ITF M15 Monastir | 2021/06/24 08:30 | Rinky Hijikata v Uisung Park | 6-1,6-7,0-6 |
| ITF M15 Monastir | 2021/06/23 08:30 | Adam El Mihdawy v Uisung Park | 6-4,1-6,2-6 |