Sir Alex Ferguson has called for Manchester United and Liverpool fans to end the tasteless chanting that has marred games between the two clubs.<br />Liverpool have had to endure chants from their rivals' supporters about the Hillsborough disaster.<br />But Liverpool fans have also been guilty of singing about Manchester United's Munich air disaster.<br />"You'd hope that this is a line in the sand in terms of how the fans behave with one another," Ferguson said.<br />The Scot, speaking at a news conference ahead of United's home game with Wigan on Saturday, added: "We are two great clubs and we should understand each other's problems in the past. Certainly the reputation of both clubs doesn't deserve it.<br /><br />"Both clubs have suffered fatalities through football.<br />"You hope that fans do behave themselves and support their team and that will be the end of it."<br />Ferguson's remarks come after a damning report of the Hillsborough Independent Panel cleared Liverpool supporters of any blame relating to the 1989 tragedy, when 96 fans died, and revealed South Yorkshire Police changed statements.<br />Prime Minister David Cameron on Wednesday offered a "profound" apology to the families of those who died.<br />Liverpool and Manchester United meet at Anfield in the Premier League on Sunday, 23 September.<br />It will be Liverpool's first home game since the dramatic findings relating to the Hillsborough disaster were released.<br />"The fact we are playing them after the findings we have been reading about in the last couple of days does bring a focus to it," Ferguson added.<br />On Thursday, Liverpool manager Brendan Rodgers said he hoped the publication of the truth about the Hillsborough disaster would end the hurtful chants by "idiots".<br />"I speak as a human being and I don't ever like to hear anything like that, whatever club it is, that associates with other people's tragedies and death," Rodgers said.<br />"Unfortunately you have a very small percentage of idiots at any club who will always try to smear another club's reput
