"You have to believe in the style we are playing, we did that," said Rosicky after victory at Standard Liege.
"It is really satisfying when you can turn a match around like this.
"If you do not believe, you cannot turn a game like this.
"You just have to continue to pass the ball like we always do.
"We know that inside we are strong enough to turn games like this, and that is what we proved in Liege."
Rosicky added: "We knew that after the two defeats in Manchester, we needed a result. The performance in Liege will help with the confidence."