| WTT Feeder Budapest Quals | 2022/07/18 13:20 | Rafael De Las Heras v Ziyang Yu | L | 0-3 |
| Qatar Open - Mixed dubbel | 2019/03/20 12:55 | Takumi Ichinose v Rafael De Las Heras | L | 3-0 |
| EM | 2022/08/16 10:00 | Florent Lambiet v Konstantinos Konstantinopoulos | L | 3-0 |
| EM | 2022/08/15 09:15 | Konstantinos Konstantinopoulos v Marios Yiangou | L | 0-3 |
| EM | 2022/08/14 14:30 | Lubomir Pistej v Konstantinos Konstantinopoulos | L | 3-1 |
| WTT Contender - Zagreb - Kval | 2022/06/13 14:40 | Florent Lambiet v Konstantinos Konstantinopoulos | L | 3-0 |
| EM - Lag | 2021/09/29 13:25 | Anton Kallberg v Konstantinos Konstantinopoulos | L | 3-0 |
| EM - Lag | 2021/09/28 16:40 | Martin Allegro v Konstantinos Konstantinopoulos | L | 3-1 |
| World Team Olympic Quals | 2020/01/23 17:30 | Tomislav Pucar v Konstantinos Konstantinopoulos | L | 3-0 |
| Euro Team Champs | 2019/09/04 09:00 | Konstantinos Konstantinopoulos v Zihni Sahin | W | 3-0 |