Rangers have urged the club's supporters to behave in the "correct manner" during Sunday's Scottish Cup game against Aberdeen.
The message from the club comes after manager Steven Gerrard requested a section of supporters stop singing offensive chants about Kilmarnock manager Steve Clarke.
"Let's not give anyone a chance to criticise this great club, your club," Rangers said in a statement ahead of Sunday's game at Pittodrie.
"The majority of our supporters recognise that they are the club's ambassadors and that unacceptable behaviour has no place in our ranks.
"Let's go to Aberdeen determined to make sure that triumphs, like that wonderful 5-0 Scottish Cup replay win against Kilmarnock last week, are not downplayed because of negative headlines generated by unacceptable chants and songs.
"If this continues, those fans who indulge will succeed only in damaging their own club. Support the team, be louder than our opponents and drive our players forward but let's do so in the correct manner.
"Let's not give anyone a chance to criticise this great club, your club."
Police Scotland have encouraged supporters of both Rangers and Aberdeen to behave themselves ahead of Sunday's game, and say anyone who is drunk will not be allowed to enter the stadium.