Chelsea players Didier Drogba and Jose Bosingwa have been charged with misconduct by Uefa after the ugly scenes at the end of their Champions League semi-final, second leg against Barcelona earlier this month.
The European governing body has also brought disciplinary proceedings against the club for the improper conduct of their players and the throwing of missiles by their fans.
Barcelona went through to Wednesday's final against Manchester United on away goals after the match ended in a 1-1 draw at Stamford Bridge. Drogba harangued Norwegian referee Tom Henning Ovrebo after the final whistle before directing a foul-mouthed tirade at a television camera while Bosingwa made disparaging remarks about Ovrebo in the media. Both face charges of bad sportsmanship.
"Uefa has today announced that it has instigated disciplinary proceedings against Chelsea and two Chelsea players," a statement said.
"The disciplinary proceedings are based on the following charges: for being responsible for the improper conduct of players and the throwing of missiles by their supporters.
"Didier Drogba and Jose Bosingwa for being in breach of the principles of sportsmanship by insulting the referee by making offensive comments."
Uefa has asked for statements from the club and the two players by 29 May. Their control and disciplinary panel will deal with the case on 17 June.