Mezue ahịrịokwu na-esonụ: A kpọrọ Hollenstein na Switzerland U20 National Team 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.