"You know in the Champions League there will always be difficult games and tough teams to play against," said Benitez.
"Lyon might not have won the league last season but before that they won it many years in a row, so we know they have lots of good players who can play good football.
"Fiorentina are an historic club in a nice city. I know from experience they have fanatstic supporters because I spent some time there when Claudio Ranieri was the coach.
"And we have experience of Hungarian football because of our relationship with MTK, so if Debreceni have won their league then we know it means it's because they're a good side.
"The important thing as always is that the travelling isn't too bad, we don't have too far to go for any of the games. We're just looking forward to starting the competition now."