Stadium: Court 4 Round: 62 Ground: Clay
| ITF M15 Novi Sad | 2021/07/25 12:00 | Marko Stakusic v Nikolas Lahky | 3-6,5-7 |
| ITF M25 Kottingbrunn | 2021/07/18 07:30 | Nikolas Lahky v Samuel Puskar | 3-6,2-6 |
| ITF M15 Poprad | 2021/07/04 08:00 | Janos Fekete v Nikolas Lahky | 6-2,7-6 |
| ITF M25 Wroclaw | 2021/06/27 12:30 | Michal Novansky v Nikolas Lahky | 6-4,6-4 |
| ITF M15 Sarajevo | 2021/05/31 12:00 | Moritz Trocker v Nikolas Lahky | 6-2,6-1 |
| ITF M15 Sarajevo | 2021/05/30 10:30 | Nikolas Lahky v Petar Pjevcevic | 6-3,7-5 |
| ITF M15 Bucharest | 2021/05/23 08:30 | Nikolas Lahky v Filippo Speziali | 3-6,3-6 |
| ITF M15 Sibenik | 2021/04/18 08:00 | Nikolas Lahky v Mayeul Darras | 5-7,7-6,4-10 |
| ITF M25 Idanha-A-Nova | 2021/07/12 11:35 | Daniel Little v Bekkhan Atlangeriev | 6-2,4-6,10-2 |
| ITF M25 Idanha-A-Nova | 2021/07/11 10:30 | Andre Rodeia v Bekkhan Atlangeriev | 6-7,6-7 |
| ITF M15 Sofia | 2021/07/04 06:30 | Mihnea L.S. Turcu v Bekkhan Atlangeriev | 6-1,6-4 |
| ITF M25 Belgrade | 2021/06/28 07:00 | Viktor Jovic v Bekkhan Atlangeriev | 6-4,6-4 |
| ITF M15 Helsinki | 2021/06/01 07:00 | Bekkhan Atlangeriev v Karl Kiur Saar | 2-6,6-2,9-11 |
| ITF M15 Kouvola | 2021/05/26 06:00 | Anton Matusevich v Bekkhan Atlangeriev | 6-2,6-3 |
| ITF M15 St Petersburg Qual | 2021/02/07 13:55 | Evgeny Philippov v Bekkhan Atlangeriev | 6-3,6-3 |
| ITF M15 St Petersburg | 2021/01/31 08:00 | Maxim Krapivin v Bekkhan Atlangeriev | 7-6,3-6,10-6 |