| WTT Contender Novo Gorica | 2022/11/01 15:40 | Kay Stumper v Ricardo Walther | W | 2-0 |
| WTT Contender Lima - Kval | 2023/08/01 23:30 | Kay Stumper v Eduardo Mendoza | W | 3-0 |
| WTT Contender Zagreb - Kval | 2023/06/26 16:50 | Kay Stumper v Vincent Picard | L | 0-3 |
| WTT Contender - Tunis - Kval | 2023/06/21 10:45 | Florent Lambiet v Kay Stumper | L | 3-1 |
| WTT Contender - Tunis - Kval | 2023/06/20 11:45 | Tamas Lakatos v Kay Stumper | W | 1-3 |
| WTT Star Contender Bangkok - Kval | 2023/04/24 11:40 | Kay Stumper v Cheng-Jui Kao | L | 0-3 |
| WTT Star Contender Bangkok - Kval | 2023/04/24 03:50 | Kay Stumper v Man Ho Kwan | W | 3-1 |
| WTT Star Contender Bangkok - Kval | 2023/04/23 05:05 | Samuel Walker v Kay Stumper | W | 0-3 |
| Champions League | 2023/04/03 18:50 | Kay Stumper v Takuya Jin | W | 3-0 |
| WTT Contender Lima - Kval | 2023/08/01 23:25 | Nandor Ecseki v Ricardo Walther | W | 0-3 |
| WTT Star Contender Ljubljana - Kval | 2023/07/04 11:45 | Ricardo Walther v Satoshi Aida | L | 1-3 |
| WTT Star Contender Ljubljana - Kval | 2023/07/03 17:35 | Ricardo Walther v David Serdaroglu | W | 3-0 |
| WTT Contender Zagreb | 2023/06/30 14:05 | Ricardo Walther v Gaoyuan Lin | L | 0-3 |
| WTT Contender Zagreb | 2023/06/29 12:00 | Ricardo Walther v Siu Hang Lam | W | 3-2 |
| WTT Contender Zagreb - Kval | 2023/06/28 12:55 | Ricardo Walther v Nima Alamian | W | 3-1 |
| WTT Contender Zagreb - Kval | 2023/06/27 15:20 | Ricardo Walther v Emmanuel Lebesson | W | 3-2 |
| WTT Contender Zagreb - Kval | 2023/06/26 16:50 | Ricardo Walther v Aidos Kenzhigulov | W | 3-0 |