Tuhia he haere tonu mo tenei whitianga - I whakaingoatia a Hollenstein ki te kapa U20 o Switzerland mo te 2019 World Junior Championships
i Kānata. I arahina e ia a Switzerland ki te wha o nga waahi, ka hinga ki a Finland i nga whiringa toa. I uru ano a Hollenstein ki te kapa mo te 2020 World Junior Championships i te Czech Republic.