| Latvia Int. Qual | 2021/08/26 09:00 | Balint Papai v Sobolewski, Michal | L | 2-0 |
| Polish Int. Qual | 2019/09/19 14:00 | Bugtrup, Sebastian v Sobolewski, Michal | L | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/09/20 11:05 | Milic, Luka v Sobolewski, Michal | L | 2-0 |
| Giraldilla Int. XD | 2017/04/11 16:20 | Sobolewski, Michal v Alcala Dominguez, Alex | L | 0-2 |
| Ukraine Int. | 2021/09/08 10:40 | S. Sankar Muthusamy Subramanian v Fabio Caponio | L | 0-2 |
| Denmark Masters Qual | 2021/08/05 07:00 | Karan Rajan Rajarajan v S. Sankar Muthusamy Subramanian | L | 2-0 |
| India PBL | 2020/02/04 11:00 | Cheuk Yiu Lee v S. Sankar Muthusamy Subramanian | L | 2-0 |