[52] Federico Delbonis 3-6,6-3,6-4 Lukas Klein [254] 2021-05-24 13:10
Stadium: Court 1 Round: 25 Ground: Hardcourt indoor
Home History
| ATP Rome | 2021/05/14 08:00 | Federico Delbonis v Reilly Opelka | 5-7,6-7 |
| ATP Rome | 2021/05/13 12:55 | Felix Auger Aliassime v Federico Delbonis | 6-7,1-6 |
| ATP Rome | 2021/05/12 12:10 | Federico Delbonis v David Goffin | 6-2,6-1 |
| ATP Rome | 2021/05/10 11:10 | Karen Khachanov v Federico Delbonis | 6-3,4-6,0-6 |
| ATP Rome | 2021/05/08 13:35 | Marcos Giron v Federico Delbonis | 3-6,3-6 |
| ATP Madrid | 2021/05/06 17:35 | Matteo Berrettini v Federico Delbonis | 7-6,6-4 |
| ATP Madrid | 2021/05/05 12:15 | Albert Ramos-Vinolas v Federico Delbonis | 6-7,3-6 |
| ATP Madrid | 2021/05/03 19:10 | Federico Delbonis v Pablo Carreno Busta | 3-6,6-4,6-3 |
Away History
| ATP Belgrade | 2021/05/23 10:25 | Christopher O'Connell v Lukas Klein | 7-6,7-5 |
| ATP Belgrade | 2021/05/22 10:35 | Marko Tepavac v Lukas Klein | 4-6,1-6 |
| Challenger Ostrava | 2021/04/30 10:40 | Arthur Rinderknech v Lukas Klein | 3-6,6-3,6-4 |
| Challenger Ostrava | 2021/04/28 09:00 | Lukas Klein v Lukas Rosol | 7-6,4-6,6-2 |
| Challenger Ostrava | 2021/04/27 10:00 | Peter Polansky v Lukas Klein | 3-6,5-7 |
| Challenger Ostrava | 2021/04/26 09:30 | Rudolf Molleker v Lukas Klein | 3-6,1-6 |
| Challenger Ostrava | 2021/04/25 10:00 | Andrew Paulson v Lukas Klein | 6-2,3-6,2-6 |
| Challenger Split | 2021/04/13 13:15 | Lukas Klein v Hugo Gaston | 3-6,6-3,3-6 |