Cech has delivered a stark ultimatum to any Chelsea player opposed to Roman Abramovich's hiring and firing policy, saying: "If you don't like it, you can leave."
Asked if it was difficult getting used to new managers, Cech said: "You adapt or you're out. It's as simple as that.
"You're here to play, you're here to do what the club and manager wants you to do. If you don't like it, you can leave.
"I'm here to play, I want to play so I do everything I can straight away so that the manager has no option but to put me in goal.
"That's the way I work and is the way it works for everybody because, if you stay sad and don't do the right things, you can end up on the bench and you're not playing and it will be even more disappointing.
"As a player, you need to do the right thing all the time."