Luciano Spalletti has said a string of defenders will not be deployed to cage Ronaldo.
Ronaldo scored 11 goals in the group stages of the UCL and also picked up a brace in the win over Bilbao.
And ahead of the clash with Madrid on Wednesday, Spalletti is not looking to surround the Portuguese with defenders.
“I don’t think so,” the Roma coach said when asked whether Ronaldo is a fading force.
“Ronaldo is one of the best players in the world. He can always make the difference.
“He’s a modern player: strong, fast, and able to score a lot of goals. But I won’t make a cage around him, I won’t use three players to mark him.
“The player to counter Ronaldo must be – amongst other things – quick. Alessandro Florenzi could be an option.”