| ETTU - Europe Trophy | 06/01 14:35 | - | Boguslaw Koszyk v Konstantinos Konstantinopoulos | W | 2-3 | |
| ETTU - Europe Trophy | 06/01 08:10 | - | Ingemar Peter v Konstantinos Konstantinopoulos | W | 0-3 | |
| ETTU - Europe Trophy | 05/31 14:05 | - | K Konstantinopoulos v Yevhen Pryshchepa | L | 0-3 | |
| WTT Feeder Panagyurishte Quals | 09/01 13:40 | - | Konstantinos Konstantinopoulos v Liu, Yebo | L | 0-3 | |
| WTT Feeder Panagyurishte Quals | 08/31 15:00 | - | Miguel Nunez v Konstantinopoulos, Konstantinos | W | 0-3 | |
| WTT Feeder Panagyurishte Quals | 08/30 14:00 | - | Rafael De La Heras v K Konstantinopoulos | W | 1-3 | |
| European Championships | 08/16 10:00 | - | Florent Lambiet v Konstantinos Konstantinopoulos | L | 3-0 | |
| European Championships | 08/15 09:15 | - | Konstantinos Konstantinopoulos v Marios Yiangou | L | 0-3 | |
| European Championships | 08/14 14:30 | - | Lubomir Pistej v Konstantinos Konstantinopoulos | L | 3-1 | |
| WTT Contender Zagreb Quals | 06/13 14:40 | - | Florent Lambiet v K Konstantinopoulos | L | 3-0 | |
| European Team Championships | 09/29 13:25 | - | Anton Kallberg v K Konstantinopoulos | L | 3-0 | |
| European Team Championships | 09/28 16:40 | - | Martin Allegro v K Konstantinopoulos | L | 3-1 | |
| World Team Olympic Quals | 01/23 17:30 | - | Tomislav Pucar v Konstantinos Konstantinopoulos | L | 3-0 | |
| Euro Team Champs | 09/04 09:00 | 1 | Konstantinos Konstantinopoulos v Sahin Zihni, Batuhan | W | 3-0 |