Stadium: Court 8 Round: 25 Ground: Clay
| ITF - M15 Monastir | 2021/07/13 09:30 | Jeremy Beale v Lukas Krainer | 6-3,6-3 |
| ITF - M15 Monastir | 2021/07/06 08:00 | Lukas Krainer v Adam El Mihdawy | 1-6,4-6 |
| ITF - M15 Helsinki | 2021/05/31 07:00 | Lukas Krainer v Adrien Burdet | 5-7,3-6 |
| ITF - M15 Kouvola | 2021/05/26 06:00 | Alessandro Bega v Lukas Krainer | 6-1,6-2 |
| ITF - M15 Káhira | 2021/04/28 14:55 | Jack Pinnington Jones v Lukas Krainer | 7-6,2-6,6-3 |
| ITF - M15 Káhira | 2021/04/20 08:00 | Lukas Krainer v Gian Marco Ortenzi | 4-6,6-7 |
| ITF - M15 Káhira | 2021/04/19 08:00 | Lukas Krainer v Lorenzo Claverie | 6-2,6-7,11-9 |
| ITF - M15 Káhira | 2021/04/18 07:00 | Lukas Krainer v Stephanos Schinas | 6-1,6-1 |
| ITF - M15 Káhira | 2021/07/20 08:00 | Saud Alhogbani v Lautaro Agustin Falabella | 4-6,1-6 |
| ITF - M15 Káhira | 2021/07/19 07:30 | Thiago Cigarran v Saud Alhogbani | 6-7,1-6 |