Di Matteo, speaking at a pre-match news conference, was boosted by the news that Didier Drogba, David Luiz and Raul Meireles, who were all doubtful for the game, trained on Tuesday and look set to be fit for the match at Stamford Bridge.
Chelsea are favourites to reach the semi-finals for the sixth time in nine seasons, but Di Matteo said they could take nothing for granted against a side that has scored in all of their away matches in the competition this season.
"It is a danger. This is half-time and we're leading 1-0. But a 1-0 lead is basically nothing," he said.
"The players are aware of this, and we'll have to go into this game with the right attitude, the same attitude as against Napoli.
"Nothing has been done yet. We're aware of that. We need to go and qualify for the next round."
"They have scored in every away game of their Champions League season, so it's a difficult task tomorrow night."
"It's a fantastic club, I'll agree with you on that," he said. "I need to win games, it's as simple as that. It's a results business and that's all that matters."
