Players' union claims Uefa protocol not followed

We're very disappointed that a clear agreed protocol which is designed to deal with these situations was not effected.

The player, having done what was asked of him to notify the referee, quite rightly expected that the referee would go speak with the safety officer, and the (UEFA) protocol agreed is that the safety officer should make a stadium announcement warning the fans that if the chants do not desist that the game will be stopped.

Obviously it's difficult in a pressure situation, referees have lots to think about but there are a number of officials at games, nothwithstanding the fact you've got additional referees behind the goals in Champions League matches.