Sir Alex Ferguson says he understands the reaction of disgruntled Manchester United fans after his side's 1-0 Champions League defeat by Lille.
United were booed off the field by their 5,000 travelling supporters but Ferguson had no complaints.
He said: "Without question, those fans want to see us win. They have followed us through thick and thin.
"They were like that when we had not won the title for 20 years and I am sure they will be like that again."
United are now third in Group D and Ferguson admits his side are fighting for their Champions League survival.
He added: "We are going to have to regroup and win our next two matches against Villarreal and Benfica because they are vital now.
"Our home form has been terrific and it is going to have to be again. We are third in the group now and these games will be so important."
Ferguson was in subdued mood after his side followed up their humiliating 4-1 defeat at Middlesbrough with another demoralising setback.
He said: "We were not in our best form, that has to be said. We are going to have to fight our way through this.
"No-one's going to help us with that. We are going to have to do it ourselves and we don't want to feel sorry for ourselves - although I don't think we deserved to lose."
Ferguson was unhappy with the lack of threat from United, and admitted: "It is a concern, but our goalscoring has not been great, either this season or last.
"We do make chances, we have seen that in some league games, but we have players who can score goals and hopefully we can get that magic back.
"The players did their best. We lost a goal just when we were starting to get to grips with the game.
"I think when you lose games confidence does get affected, but we have to pull ourselves through this."
United striker Ruud van Nistelrooy admitted things had fallen away recently for the team.
"When I came to Manchester United four-and-a-half years ago, we were unbeatable," he said.
"I remember games when I had four or five opportunities, constant service and we attacked. It was great and I enjoyed it.
"We all want those days to come back. The question is how do we do it?
"We need to look at the squad; look at everything. Each of us knows within themselves what is going to happen.
"Without doubt, this is the most difficult time I have had since I came to United. But I am not going anywhere."