Nyorai kuenderera mberi kweiyi ndima - Hollenstein akatumidzwa zita kuSwitzerland U20 timu yenyika ye2019 World Junior Championships
muCanada. Akatungamirira Switzerland kusvika kunzvimbo yechina, ichidonha kuFinland mumasemifainari. Hollenstein aive zvakare chikamu chechikwata che2020 World Junior Championships muCzech Republic.