Chelsea boss Andre Villas-Boas has warned any players attempting to go against his plans face being bombed out.
Villas-Boas admits he expects some players to dig in their heels.
Asked whether, when trying to change the culture of a club, he had anticipated resistance, Villas-Boas said: "That is normal. I think you expect resistance and disappointment, but there must always be a sense of responsibility to the employer. The players have to perform. Either they do that or they become part of the change. The players have been excellent in accepting this is a job that needs to be done. Understanding is needed, and it takes time because of the foundations laid down at this club. That is not an excuse. You have the best players around and we should be doing much better.