| Hellas Open | 2019/08/09 06:30 | Adrian Dziolko v Joel Koenig | L | 2-0 |
| Peru Future Series | 2019/05/10 21:00 | Joel Koenig v Daniel La Torre Regal | L | 0-2 |
| Dutch International - kvalifikace | 2019/04/11 14:20 | Bruno Carvalho v Joel Koenig | L | 2-1 |
| Swiss Open - čtyřhra ženy - kvalifikace | 2019/01/17 11:00 | Ditlev Jaeger Holm v Joel Koenig | L | 2-0 |
| Swiss Open - čtyřhra ženy - kvalifikace | 2018/11/21 11:43 | Alex Lane v Joel Koenig | L | 2-0 |
| Swiss Open - čtyřhra ženy - kvalifikace | 2018/11/21 09:54 | Joel Koenig v Ciar Pringle | W | 2-0 |
| Swiss Open - čtyřhra ženy - kvalifikace | 2018/10/30 11:45 | Hannes Gerberich v Joel Koenig | L | 2-0 |
| Swiss Open - čtyřhra ženy - kvalifikace | 2018/02/20 14:32 | Joel Koenig v Riichi Takeshita | L | 0-2 |
| Hyderabad Open | 2019/08/07 06:10 | Shesar Hiren Rhustavito v Kartikey Gulshan Kumar | L | 2-0 |
| Hyderabad Open | 2019/08/06 13:30 | Kartikey Gulshan Kumar v Harsheel Dani | W | 2-0 |
| Slovenia Int. | 2019/05/16 08:30 | Kalle Koljonen v Kartikey Gulshan Kumar | L | 2-1 |
| Denmark Int. Qual | 2019/05/09 08:00 | Kartikey Gulshan Kumar v David K Kristensen | L | 1-2 |
| India Open | 2019/03/27 08:50 | Sai Praneeth B. v Kartikey Gulshan Kumar | L | 2-1 |
| India Open Qual | 2019/03/26 06:55 | Siddharth v Kartikey Gulshan Kumar | W | 0-2 |
| India Open Qual | 2019/03/26 05:05 | Kartikey Gulshan Kumar v Satinder Malik | W | 2-0 |
| Giraldilla Int. XD | 2018/11/21 09:00 | Vicky Angga Saputra v Kartikey Gulshan Kumar | L | 2-1 |