Pedzisa mutsara unotevera: Berni akatumidzwa kuSwitzerland U20 national team ye2018 World Junior Championships. Akatamba mitambo mishanu, asina kuwana poindi. Akapindazve muchikwata nokuda kwe
2019 World Junior Championships, achitamba mitambo yese minomwe (2 anobatsira) kubatsira Switzerland kupedzisa 4th mumutambo. Berni akatumidzwa kuchikwata che2020 World Junior Championships, mwaka wake wekupedzisira wekukodzera.