| ITF Hungary F5 | 2016/09/10 08:00 | Matthew Kandath v Kevin Portmann | 6-2,6-0 |
| ITF Serbia F5 Qual | 2016/08/13 07:00 | Martin Dimitrov v Kevin Portmann | 6-0,6-1 |
| ITF Slovakia F3 | 2016/08/07 07:30 | Kevin Portmann v Marek Gengel | 1-6,0-6 |
| ITF Slovakia F2 | 2016/07/31 06:30 | Kevin Portmann v Fabian Marozsan | 3-6,2-6 |
| ITF Hungary F1 Qual | 2016/04/17 08:00 | Martin Zeljenka v Kevin Portmann | 6-0,6-0 |
| ITF USA F8 Qual | 2016/02/19 17:00 | Kevin Portmann v Reilly Opelka | 1-6,0-6 |
| ITF Austria F8 | 2015/08/15 07:30 | Marco De Rossi v Kevin Portmann | 6-1,6-0 |
| ITF Turkey F17 | 2015/04/25 08:00 | Kevin Portmann v Omer Berk Gorgun | 3-6,3-6 |
| ITF Austria F8 | 2016/08/30 08:30 | Markus Sedletzky v Petr Hajek | 6-4,4-6,6-3 |
| ITF Austria F8 | 2016/08/28 08:00 | Damon Gooch v Petr Hajek | 4-6,5-7 |
| ITF Slovakia F3 | 2016/08/10 12:35 | Ondrej Krstev v Petr Hajek | 7-6,6-2 |
| ITF Slovakia F3 | 2016/08/09 07:30 | Petr Hajek v Michal Selecky | 6-2,6-3 |
| ITF Slovakia F3 | 2016/08/08 07:30 | Petr Hajek v Nikolas Lahky | 6-2,6-4 |
| ITF Slovakia F3 | 2016/08/07 07:30 | Petr Hajek v Jakub Filipsky | 3-6,6-3,6-2 |
| ITF Austria F3 | 2016/07/21 11:45 | Filip Brtnicky v Petr Hajek | 6-4,6-4 |
| ITF Austria F3 | 2016/07/18 07:45 | Petr Hajek v Gabriel Schmidt | 6-3,6-1 |