"The Manchester defeat was a one-off and we hope it is impossible for it to ever happen again. We have to play our game and I think we did better in the first leg than the second because we had to fight back from a goal down.
"It wasn't easy to come here with a packed out stadium and face a club of such history, but if you start thinking about that you'll do nothing, so we focused only on ourselves."
He added: "We are aware that we are a good squad, as we have reached the final eight for two years running. There is a long road to Moscow, but we believe and this win will give us even more faith."
They are also only six points adrift of the Serie A leadership and in the final four of the Coppa Italia.
"The Coppa Italia may be a smaller trophy, but we are in the semi-finals and would be idiots to give up at this stage."