Pedzisa mutsara unotevera: Paaiva muduku, Koivu akakwikwidza mumakwikwi maviri eWorld Junior U18 Championships, akahwina ndarama muna 2000 uye ndarira muna 2001. Koivu akaita basa rakapetwa muna 2001, achibatanidzwawo mu
World Junior Championships, achiwana menduru yesirivha apo achipa rubatsiro rwezvitatu.