Monreal will either be up against Gareth Bale, Rodrygo Goes or Vinicius Junior on Saturday, so who would he rather face?
"Bale is a beast of a player, even though lots of things are being said [about him] that aren't sport-related," Monreal told Radio MARCA.
"Rodrygo is also very good. He's the one who will make us suffer.
"I like to watch as much football as possible.
"I analyse all our opponents and I love how [Karim] Benzema plays at Real Madrid."