He didn't do anything. He wasn't a coach and I'd be shocked in Ancelotti took any tactical advice from him. He was a token gesture appointment so that the management set-up wasn't made completely of outsiders.
That said, I'm sure the nonsense and needless speculation his sacking cuased, done Chelsea no favours.
i disagree disturbing a winning formular and medeling cost chelsea bigtime
but if you pay the bills you can do what you like