Rambai muchinyora ndima iyi - Paaive mudiki, Koivu akakwikwidza mumakwikwi maviri eWorld Junior U18 Championships, akahwina goridhe muna 2000 uye bronze muna 2001. Koivu akaita basa rakapetwa kaviri muna 2001, achitorawo chikamu muWorld Junior Championships
, achiwana menduru yesirivha apo aipa rubatsiro rwezvitatu.