Uefa has admitted it is concerned over the conduct of players on the pitch following ugly scenes during Chelsea's Champions League clash with Paris Saint-Germain.
Manager Jose Mourinho's side have been widely criticised for their reaction to a tackle on Oscar by Zlatan Ibrahimovic that saw the Swede shown a straight red card in quarter-final, second-leg match on 11 March.
Eight Chelsea players were pictured crowding referee Bjorn Kuipers immediately after the challenge in an apparent attempt to influence his decision to send off the PSG striker, who later accused the opposition of acting like "babies".
PSG continued the game with 10 men for 89 minutes to hold the home side to a 2-2 draw after extra time, a result eliminating Chelsea from the competition on the away goals rule.
The scenes have sparked fresh debate over disgruntled players putting pressure on officials during games and Uefa has admitted president Michel Platini has since made his concerns known.
"The Uefa president has recently been more concerned about the behaviour of players on the pitch and it is something we are looking at the moment to see what can be done," Uefa's head of media Pedro Pinto said in a statement.
"Obviously, we would like to see an environment where players would accept the decisions taken and where they would not employ the tactic of pressure and intimidation of the officials during the game.
"Right now, there is a strong interest internally to look at specific initiatives and campaigns, and possibly regulations, that would be a positive influence on football and would hopefully have an impact on the behaviour of players.
"We are aware there is concern regarding the behaviour overall. It is not a good example for fans, for future players or for the image of the game."
European football's governing body has also confirmed that Ibrahimovic's controversial red will not be rescinded.
Mourinho was among those calling for the decision to be overturned but Uefa rules state the referee's decision is final unless it is a case of mistaken identity.
A Uefa spokesman said: "Decisions taken by the referee on the field of play are final and may not be reviewed by the Uefa disciplinary bodies."
Ibrahimovic is set to miss the first leg of PSG's Champions League quarter-final as a result.