Man Utd skipper Vidic: Fans will behave for Liverpool
Wednesday night's game passed without incident and Vidic believes it will be the same on Sunday.
"I don't think we should put so much pressure on our fans," he said. "People always try to make a big thing out of a small one but I don't have any worries.
"We have shown many times in the past and I think we will be proud of them.
"The big teams respect each other and we are going to play football."