<page_title> Olympiacos F.C. in European football </page_title> <section_title> Match table </section_title> <table> <cell> 1963–64 <col_header> Season </col_header> </cell> <cell> European Cup Winners' Cup <col_header> Competition </col_header> </cell> <cell> Poland <col_header> Country </col_header> </cell> <cell> Zagłębie Sosnowiec <col_header> Club </col_header> </cell> </table>
Zagłębie Sosnowiec from Poland took part in the European Cup Winners' Cup with Olympiacos in 1963–64.