Cech sees little alteration in Mourinho after nearly six years away.
"He is as hungry as ever, he wants to be successful," Cech said.
"When you have someone who works at such a high standard every day it never changes. It's the same.
"He doesn't do things just for nothing, he always wants to win games, no matter if it is a Premier League game or a pre-season game or Champions League game.
"He's always pushing the players hard to train, to concentrate, to do things in the right way."