Luiz, a boyhood Corinthians fan, identified his Brazil team-mate as a being among the South American champions' key threats in the Club World Cup.
"Paulinho plays for the national team, and [there are] other experienced players like Douglas, the number 10, who has a lot of quality with his left foot," Luiz said.
"I have lots of friends there. I know them, they know me. If it's this game in the final, it's a great game to have."