After Lionel Messi was twice approached by fans on the field during a Champions League game, UEFA has fined Olympiakos 60,000 euros ($70,000).
UEFA says Greek champion Olympiakos was found guilty of "field invasions by supporters" among a range of charges relating to the October 31 game.
Messi was hugged and kissed by a male fan near the corner flag, and he was approached by a fan for a selfie photograph late in the 0-0 draw in Piraeus.
The UEFA-imposed fine also included charges for "illicit chants" by Olympiakos fans who also aimed laser pointers at Barcelona players.
Three football officials who pleaded guilty in American courts for accepting bribes were banned for life by the FIFA ethics committee on Tuesday.
They include former FIFA audit committee member Richard Lai of Guam, who testified in federal court that the source of his bribe money was Olympic powerbroker Sheikh Ahmad al-Fahad al-Sabah of Kuwait.
"His guilty plea related, amongst others, to schemes in which he received bribes in exchange for his support in relation to the FIFA presidential elections and to gain control and influence within the AFC (Asian Football Confederation) and FIFA," the soccer body said of Lai in a statement.
Sheikh Ahmad referred his own case to the ethics committees of FIFA and the International Olympic Committee in April after Lai's guilty plea was revealed. The Kuwaiti royal also withdrew from an election to retain his seat representing Asia on the FIFA Council.