Mancini told Inter Channel: “It will be a very dangerous match. Valencia are one of the best teams around at the moment.
“They will be two tough games where we will not be allowed any mistakes.
“I think they will play a bit like Cagliari did against us at the weekend – always ready to counter-attack,” continued the tactician.
“The Champions League is a different competition from the Italian Championship. Every match will be a challenging one.”