De Boer only took over a few days ago from Roberto Mancini.
“I'm happy we got a good result too, but the most important game is next weekend. Now we have a week to prepare for our trip to Chievo.
“We'll get better from week to week, but the next game is the most important one and the first league fixture is always one of the trickiest."
“Mauro is staying with us because he's a hugely important player."