But when speaking about the Brazilian striker Ronaldo in a documentary about the late Sir Bobby Robson, Mourinho hails him as the best.
In the film charting Robson's career as a player and as a manager, Mourinho declared: "Ronaldo Nazario, the best Ronaldo EVER!"
He said: "I never saw the same, I never saw the same.
"It was the best year ever for Ronaldo.
"He [Robson] was like a dad to him.
"He understood the Brazilian kid personality and at the same time, he gave him the freedom to allow him allowed him to play on the pitch.
"I remember Bobby every day... A person only dies when the last person who loves him dies."