| World Championship Qual 2021 | 04/09 18:50 | 8 | Alexander Ursenbacher v Lukas Kleckers | 6-2 | |
| World Championship Qual 2021 | 04/07 08:30 | 7 | Peter Devlin v Lukas Kleckers | 1-6 | |
| WST Pro Series 2021 | 03/14 20:30 | 1 | Joe O'Connor v Lukas Kleckers | 2-0 | |
| WST Pro Series 2021 | 03/14 18:40 | 1 | Stuart Carrington v Lukas Kleckers | 2-1 | |
| WST Pro Series 2021 | 03/14 17:00 | 1 | Eden Sharav v Lukas Kleckers | 2-0 | |
| WST Pro Series 2021 | 03/14 15:30 | 1 | Soheil Vahedi v Lukas Kleckers | 2-1 | |
| WST Pro Series 2021 | 03/14 13:30 | 1 | Lukas Kleckers v Daniel Womersley | 2-0 | |
| WST Pro Series 2021 | 03/14 11:30 | 1 | Mark Selby v Lukas Kleckers | 2-1 | |
| WST Pro Series 2021 | 03/14 10:00 | 1 | Matthew Selt v Lukas Kleckers | 1-2 | |
| Gibraltar Open 2021 | 03/01 14:15 | 7 | Mitchell Mann v Lukas Kleckers | 4-0 | |
| Welsh Open 2021 | 02/15 12:10 | 7 | Matthew Selt v Lukas Kleckers | 4-0 | |
| Snooker Shoot-Out 2021 | 02/05 22:15 | 7 | Jamie Wilson v Lukas Kleckers | 1-0 |