Dee ihe na-aga n'ihu maka paragraf a - akpọrọ Hollenstein na ndị otu mba Switzerland U20 maka 2019 World Junior Championships
na Canada. O duziri Switzerland ruo ebe nke anọ, ebe Finland meriri ha na semi-finals. Hollenstein so n'otu ndị otu maka asọmpi Iko Mbaụwa nke afọ 2020 na Czech Republic.