Ferguson's side face Southampton at Old Trafford on Wednesday evening knowing a victory would re-establish the seven-point lead they built up over the festive period but even if the Red Devils are successful Mancini is not ready to throw in the towel.
"We lost two points, this is sure," he said. "But the season is long and I think I can say nothing because we played well, we had the chances but didn't score - that is all it is.
"We are disappointed with this result because we had a lot of chances to win, we dominated this game but when you play like this and don't score quickly it can be difficult."
"QPR defended very well and got players behind the ball and Julio Cesar was incredible tonight."
Mancini, who also confirmed striker Mario Balotelli is likely to complete a move to AC Milan in the coming days, reckons QPR have enough about them to survive.
"I think that if they continue to play like they did tonight [Tuesday] and defend like they did tonight [Tuesday], they will have a chance," he said.
"If Julio plays every game like he did tonight [Tuesday] then they have a chance."