| Swiss Tennis Masters | 2020/07/03 15:00 | Luca Margaroli v Gian Gruenig | 6-4,3-6,2-6 |
| Swiss Tennis Masters | 2020/07/01 13:00 | Raphael Baltensperger v Gian Gruenig | 6-4,6-2 |
| ITF M25 Schlieren | 2019/08/19 08:00 | Gian Gruenig v Thomas Setodji | 7-5,2-6,4-10 |
| ITF Germany F14 | 2018/09/30 07:00 | Gian Gruenig v Laurin Aerne | 4-6,2-6 |
| ITF Switzerland F5 | 2018/09/02 10:30 | Gian Gruenig v Anton Chekhov | 6-7,3-6 |
| ITF Switzerland F1 Qual | 2018/02/03 09:00 | Alexander Wolfschmidt v Gian Gruenig | 7-6,0-6,7-6 |
| ITF Switzerland F4 Qual | 2017/08/20 08:30 | Quentin Folliot v Gian Gruenig | 7-6,6-2 |
| ITF Switzerland F4 Qual | 2017/08/19 07:00 | Gian Gruenig v Gabriel Currlin | 6-4,6-2 |
| Swiss Tennis Masters | 2020/07/03 13:00 | Raphael Baltensperger v Yannik Steinegger | 6-4,2-6,6-2 |
| Swiss Tennis Masters | 2020/07/01 15:00 | Luca Margaroli v Yannik Steinegger | 2-6,6-2,4-6 |
| ITF M15 Loule | 2020/03/11 10:30 | Yannik Steinegger v Marvin Moeller | 3-6,4-6 |
| ITF M15 Loule | 2020/03/09 18:05 | Yannik Steinegger v Gabriele Moghini | 6-0,7-6 |
| ITF M15 Loule | 2020/03/09 13:00 | Yannik Steinegger v Andre Rodeia | 6-7,6-2,10-6 |
| ITF M15 Loule | 2020/03/08 12:00 | Yannik Steinegger v Paulo Fernandes | 6-2,6-1 |
| ITF M15 Faro | 2020/03/02 10:00 | Marvin Moeller v Yannik Steinegger | 6-1,6-4 |
| ITF M25 Trento | 2020/02/25 09:25 | Yannik Steinegger v Giuseppe Tresca | 6-4,3-6,12-14 |