Managers of Liverpool and Manchester United have urged players to act responsibly during Saturdayâ€™s FA Cup fourth-round tie at Anfield.
It is the first time the teams have met since Luis Suarez was banned for eight matches for racially abusing Patrice Evra in the 1-1 draw in October.
Liverpool boss Kenny Dalglish said: â€śWe have a responsibility to behave.â€ť
United counterpart Sir Alex Ferguson added: â€śWe want to make sure we are talking about the game, nothing else.â€ť
He continued: â€śThere is a responsibility on the players to behave properly and both sets of fans.â€ť
However, Ferguson refused to discuss whether he would select Evra, simply saying: â€śI am not getting involved in that.â€ť
Dalglish also called for the focus to be on events on the pitch.
â€śObviously everybody has a responsibility to hold up the name of their respective clubs,â€ť he added.
â€śFor us, we want to concentrate on playing football and any other sideshow is purely that – itâ€™s just a sideshow.
â€śIâ€™m sure everyone will be determined to make sure whatâ€™s done has been done. Whatever the grievances , keep it to yourself, and lets get on with the game.â€ť
Earlier this week, Ferguson wrote to all Unitedâ€™s supporters who have a ticket for the game and has made a further call for co-operation between fans, the police and stewards.
â€śIt is a massive game for both clubs. There is a tremendous profile on it,â€ť said Ferguson.
â€śI am confident. We want to talk about the game of football. It is something you want to look forward to. That is what I intend to do.
â€śOur fans were terrific there this season. The stewards have a difficult enough job as it is. We should be helping.â€ť
Despite his warning, Ferguson wants Unitedâ€™s supporters to be â€śpositive, witty and loudâ€ť.
Liverpool managing director Ian Ayre, meanwhile, wants â€śrivalry not hatredâ€ť with Manchester United.
Ayre said: â€śWe mustnâ€™t detract from fans chanting and singing at each other but it needs to be a rivalry thing rather than a hatred thing.â€ť
There have been fears that the bitter relationship between the two sets of fans could reach new levels after the Suarez suspension, resulting in an ugly atmosphere at the match.
Following the ruling on Suarez, who could return from his ban at Old Trafford on 11 February, the Football Association called on the two clubs to get together to smooth relations before the Cup tie.
Ayre is also hoping that Saturdayâ€™s clash produces a memorable football match in a lively atmosphere.
He told BBC Radio Merseyside: â€śIt is the FA Cup, a great competition in English football and one we have a great history in and we want that to be what everyone focuses on.
â€śWe have massive rivalry with Manchester United but those who are respectful also have respect for them because they are a great footballing side and team and, like us, they have been very successful.
â€śIt is about a great spirit and a match between two great teams and it is certainly not hatred – there is no place for hatred in football.
â€śThe banter on the terraces is great, both managers feel that as do the players. Far from trying to neutralise it we want our fans to be as vocal as they normally are against Manchester United.
â€śWe definitely donâ€™t want to detract from that but both clubs have histories which have some things in people donâ€™t want to hear being sung about and so we want the fans to get behind the team, have a bit of fun and enjoy the game.â€ť