The Dutchman has only presided over four matches as Nerazzurri boss since succeeding Roberto Mancini in August, winning one and losing two.
“De Boer under discussion? I should respond with strong words, but there are some gentlemen in the conference room and it wouldn't be nice!" he said.
“I can say that it is nonsense. We need to talk less and work a lot because we are behind. De Boer arrived a short while ago and he has not had much time to work with the whole squad.
“It is not easy to build something important without having a lot of time available. It needs patience."