"After many years, it's the time to refresh the team," the Italian told BBC Sport. "Chelsea changed and bought some new players, City bought four or five new players."
"He worked for 10 years at Everton and he did a really good job," he added on Moyes. "He is a good manager and I don't think he needs my advice."
United are currently seventh in the Premier League with 37 points from 22 matches.