The Italian manager said: "It was never easy, if they score at the beginning it changes the face of the match.
"Against Brugge there was a team who wanted to react after the bad defeat and it was difficult for everyone.
"It's a big test against everyone because with Rostov we are the only two teams never to play in the Champions League. It's difficult to play against teams with very good experience. It's not easy but it's okay.
"We have started well and it gives us confidence and now we have to stay calm and put our minds to the next match on Saturday (against Burnley)."