| European Championships | 04/10 17:00 | - | 악셀센, 빅토르 v 쉐퍼, 카이 | L | 2-0 | |
| Spain Masters 2020, MS, Qualification | 03/26 09:45 | 4 | Tanaka, Yushi v 쉐퍼, 카이 | L | 2-0 | |
| Polish Open | 03/23 15:00 | - | 쉐퍼, 카이 v Viktor Ording Kauffman | L | 1-2 | |
| Polish Open | 03/23 15:00 | - | 쉐퍼, 카이 v Victor Kauffmann | L | 1-2 | |
| Polish Open | 03/23 09:00 | - | 콜조넨, 칼레 v 쉐퍼, 카이 | W | 0-2 | |
| Polish Open | 03/22 14:40 | - | 쉐퍼, 카이 v 바트, 마르쿠스 | W | 2-0 | |
| Orleans Masters 2019, MS, Qualification | 03/12 13:40 | - | Daniil Dubovenko v 쉐퍼, 카이 | L | 2-1 | |
| Orleans Masters 2019, MS, Qualification | 03/12 11:55 | 4 | 쉐퍼, 카이 v 보스니크 , 대니로 | W | 2-0 | |
| Portugal Int. | 03/09 17:20 | - | 킥리츠, 마티아스 v 쉐퍼, 카이 | L | 2-0 | |
| Portugal Int. | 03/09 10:40 | - | 쉐퍼, 카이 v Rafael Gavois | W | 2-0 | |
| Portugal Int. | 03/08 10:40 | - | 쉐퍼, 카이 v Aria Dinata | W | 2-1 | |
| German Open Qual | 02/27 08:00 | 4 | Subramanian, S.sankar Muthusamy v 쉐퍼, 카이 | L | 2-0 |
Kai Hendrik Schäfer (born 13 June 1993) is a German badminton player. He competed at the 2020 Tokyo Olympics.