He said: "Felipe is our manager for a minimum of two years and we have another year option. That was the length of contract he wanted and that was good for both sides.
"We will give him all the support he needs to win and we can renew the contract at any time, so any talk that this somehow points to a lack of longevity is irrelevant.
"Felipe knows Chelsea is one of the most demanding jobs around and we want to win, not expect to win, one of the two major trophies and see progress in the style of play.
"If we don't win we will all be disappointed, him included. He knows that means he is under pressure to deliver but he welcomed that with open arms. As he said yesterday, he is no stranger to that pressure so he is not afraid of it.
"He says anything can happen in football but you start out with good intentions, we will give him the platform to realise those and that is why he was the outstanding choice."