Portugal coach Fernando Santos admits Real Madrid star Cristiano Ronaldo hates being substituted.
Santos says hooking Ronaldo is an "impossible" task.
“It's not possible to substitute Cristiano. He doesn't like it at all, he always wants to be on the pitch," he revealed.
Santos attended Ronaldo's Golden Boot ceremony yesterday.
“The word that defines him is ambition. He won't be satisfied with this [fourth golden boot], he'll want the fifth, the sixth and the seventh."