SION, Switzerland (AP) -- FC Sion says it has filed a criminal complaint against members of FIFA's executive committee over its threat to suspend Switzerland from world soccer
Sion said on its website Thursday that the threat made on Dec. 17 by soccer's ruling body amounts to unacceptable blackmail and a breach of basic legal rules.
FIFA said it wanted the Swiss national association to discipline Sion within one month over a long-running legal battle.
Sion is contesting its expulsion from the Europa League in September for fielding players signed during a FIFA transfer ban imposed in 2009.
If the suspension takes effect, FC Basel would be prevented from playing Bayern Munich in the Champions League round of 16. The first leg is scheduled Feb. 22.