Mezue ahịrịokwu na-esonụ: Egwuregwu mba ụwa mbụ nke Czerkawski na ndị otu mba Poland n'okpuru afọ 18 bụ na 1989 European U18 Division BChampionship, ebe o dekọtara isi iri na otu na egwuregwu ise ma nyere Poland aka inweta nkwalite na ọkwa kachasị elu maka 1990. Mgbe ọ sonyeere ndị otu ahụ na asọmpi 1990, o nwere isi iri na abụọ na egwuregwu isii. O sokwa Poland gbaa bọọlụ na 1990 World Junior Championship, na-agba otu goolu na egwuregwu asaa. Poland gbadara na Pool B (nke abụọ) maka 1991, ebe Czerkawski nwere ihe mgbaru ọsọ 12 na 3 nyere aka, maka isi 15, na egwuregwu 7. O mekwara mpụta mbụ ya maka ndị otu okenye Polish n'afọ ahụ, na-egwu egwu na Pool B na
1991 World Championships na-agbakọ 8 isi na 7 egwuregwu na-enyere Poland aka inweta nkwalite na ọkwa kachasị elu maka afọ na-esote.