England number one Joe Hart has been replaced and sent out on loan while Yaya Toure has been told he will not represent the club again unless his outspoken agent apologises for recent controversial comments. Other big money players in Samir Nasri, Wilfried Bony and Eliaquim Mangala have also been loaned out.
Guardiola said: "I don't take the decisions to show my authority, I don't like to take those decisions.
"I know I am going to make a mistake but I have to do that. I did it when I was 37 years old with the first team in Barcelona, and now I am older.
"The club cannot accept a manager (agent) talking in the media about decisions of the club. The players know that.
"The managers, the wives, the fathers, the sons, talking about something that is not good benefit for the club - they are not going to be part of the team.
"I don't know if they agree or not but in terms of what happens in my squad, I am the chief. I am going to decide. I don't like to do that, but it is the best for the club."