Stadium: CC Round: 25 Ground: Clay
| Challenger Skopje | 2024/05/21 10:05 | Johan Nikles v Alexander Weis | 6-3,6-7,4-6 |
| Challenger Zug | 2024/07/21 09:50 | Johan Nikles v Jakub Paul | 4-6,3-6 |
| Challenger Salzburg | 2024/07/09 11:00 | Johan Nikles v Jerome Kym | 4-6,7-5,1-6 |
| Challenger Salzburg | 2024/07/08 14:55 | Peter Benjamin Privara v Johan Nikles | 2-6,5-7 |
| Challenger Salzburg | 2024/07/08 09:50 | Johan Nikles v Yurii Dzhavakian | 6-4,7-5 |
| ITF M25 Klosters | 2024/06/28 07:30 | Patrick Zahraj v Johan Nikles | 7-5,6-3 |
| ITF M25 Klosters | 2024/06/27 07:30 | Maximilian Homberg v Johan Nikles | 1-6,5-7 |
| ITF M25 Klosters | 2024/06/26 09:55 | Johan Nikles v Sandro Kopp | 7-6,6-2 |
| ITF M25 Montauban | 2024/06/22 11:30 | Maxime Chazal v Johan Nikles | 6-4,6-2 |
| Challenger San Marino | 2024/08/01 14:00 | Andrea Pellegrino v Alexander Weis | 6-1,6-7,6-2 |
| Challenger San Marino | 2024/07/30 19:30 | Benoit Paire v Alexander Weis | 2-6,1-6 |
| ATP Kitzbuhel | 2024/07/20 10:30 | Alexander Weis v Otto Virtanen | 1-6,5-7 |
| Challenger Trieste | 2024/07/07 12:20 | Alexander Weis v Filippo Romano | 6-2,3-6,5-7 |
| Challenger Brasov | 2024/07/04 15:00 | Stefan Palosi v Alexander Weis | 6-7,6-4,6-4 |
| Challenger Milan | 2024/06/24 08:00 | Alexander Weis v Joao Eduardo Schiessl | 1-6,5-7 |
| Challenger Sassuolo | 2024/06/20 11:30 | Alexander Weis v Jesper De Jong | 7-5,3-6,3-6 |
| Challenger Sassuolo | 2024/06/19 09:00 | Thiago Agustin Tirante v Alexander Weis | 4-6,6-2,3-6 |