Lyon have not been as strong as previous seasons, but Zidane is worried.
Zidane told Real Madrid TV: “They are not the same Lyon, who won seven league titles.
“Real Madrid must be careful because for them, this will be the biggest game of the year. They must play in their normal style.
“It will be a great game. There will be a lot of enthusiasm for it.
“A lot of people will go to the game, and watch it on television.
“Real Madrid are used to playing these types of matches.”