Whakakihia te rerenga e whai ake nei: I whakaingoatia a Hollenstein ki te kapa U20 o Switzerland mo te
Ko te 2019 World Junior Championships i Kanata. 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.