Former Manchester City chief executive Garry Cook has spoken of some of the incidents that blighted his time in charge.
Cook infamously attacked AC Milan after failing to do a deal for Kaka.
He said: "I was angry at AC Milan for the way they treated the football club with regards to Kaka. In retrospect, it was disrespectful to make public statements the way I did and I obviously regret that.
"Making a mistake with Uwe Rosler, my biggest concern was if I had dishonoured Uwe Rosler or the supporters' club.
"I deeply regret making a mistake. But I'm also a great believer that if you're not making mistakes, you're not trying hard enough."