| Open da Holanda - Individuais Masculinas | 2019/10/13 12:30 | Ivanov/Sozonov v Lamsfuss/Seidel | L | 2-0 |
| Internacional de Giraldilla - Duplas Mistas | 2019/02/16 10:30 | Lamsfuss/Seidel v Ivanov/Sozonov | W | 2-0 |
| Internacional de Giraldilla - Duplas Mistas | 2019/02/14 14:30 | Ivanov/Sozonov v Lamsfuss/Seidel | L | 2-1 |
| Campeonato Europeu - Duplas Masculinas | 2021/05/01 16:00 | Astrup/Rasmussen v Lamsfuss/Seidel | W | 0-2 |
| Campeonato Europeu - Duplas Masculinas | 2021/04/30 15:40 | Lane/Vendy v Lamsfuss/Seidel | W | 1-2 |
| Campeonato Europeu - Duplas Masculinas | 2021/04/29 10:40 | Lamsfuss/Seidel v Grimley/Grimley | W | 2-1 |
| Campeonato Europeu - Duplas Masculinas | 2021/04/27 09:30 | Lamsfuss/Seidel v Jones/Stewart | W | 2-0 |
| All England Open - Duplas Masculinas | 2021/03/17 16:40 | Lamsfuss/Seidel v Goh/Tan | L | 0-2 |
| Open da Suíça - Duplas Masculina | 2021/03/07 11:30 | Lamsfuss/Seidel v Astrup/Rasmussen | L | 0-2 |
| Open da Suíça - Duplas Masculina | 2021/03/06 11:45 | Chia/Soh v Lamsfuss/Seidel | W | 1-2 |
| Open da Suíça - Duplas Masculina | 2021/03/05 15:55 | Lamsfuss/Seidel v Phuangphuapet/Viriyangkura | W | 2-1 |
| Campeonato Europeu - Duplas Masculinas | 2021/05/01 17:30 | Ivanov/Sozonov v Ellis/Langridge | W | 2-0 |
| Campeonato Europeu - Duplas Masculinas | 2021/04/30 08:40 | Clare/Flynn v Ivanov/Sozonov | W | 0-2 |
| Campeonato Europeu - Duplas Masculinas | 2021/04/29 10:20 | Birker/Stipsits v Ivanov/Sozonov | W | 0-2 |
| Open da Suíça - Duplas Masculina | 2021/03/04 14:00 | Ivanov/Sozonov v Phuangphuapet/Viriyangkura | L | 1-2 |
| Open da Suíça - Duplas Masculina | 2021/03/03 15:05 | Ivanov/Sozonov v M.R/Kapila | W | 2-0 |
| European Team Championships MD | 2021/02/19 12:00 | Labar/Maio v Ivanov/Sozonov | W | 0-2 |
| European Team Championships MD | 2021/02/18 11:40 | Jille/Tabeling v Ivanov/Sozonov | W | 0-2 |
| European Team Championships MD | 2021/02/17 11:40 | Labar/Maio v Ivanov/Sozonov | W | 1-2 |