United only managed a 2-2 draw at Old Trafford against Benfica on Tuesday night. United will now need a result in their final group game in Basel in order to reach the knockout rounds.
Ferguson told Sky Sports: “It’s going to be a hard game but the chips are down for us and I’ve got every confidence in my team.”
He added: “That was very disappointing. We played so well tonight. We made a lot of good chances, played some really great football. I have no fault with my players at all. They deserve better.
“That’s the game. It’s a cruel game at times and it was cruel for us tonight.”
United defender Phil Jones scored an own-goal in the fourth goal.
“I think we had to get into a rhythm and a tempo. We had a bad start,” Fergie said.
“It was a goal after three or four minutes. It does take the steam out of you, it takes the wind from your sails a little bit.
“Once they went to the game they played really well and they should have maybe been two or three up at half-time.
“I think it was very unfortunate we didn’t win that game.”
“We were missing a few players. There were a few injuries tonight,” he added.
“But the squad I’ve got I have no complaints about. That’s why we’ve got the squad. They proved themselves tonight and they did really well.”