(Reuters) - Wisla Krakow have threatened to boycott the Polish Cup final if a ban on their fans attending the game is upheld, club president Jaroslaw Krolewski said on Thursday.

The second-tier side reached the final with a 2-1 win over top-flight Piast Gliwice on Wednesday, but celebrations were overshadowed by a ban which threatens to deny Wisla supporters the chance to attend the final in Warsaw.