The Chelsea boss backs the Serie A coaches to succeed at their respective clubs if they are given the time to turn things around, with both Milan sides struggling
Both sides have been struggling to find their best form in Serie A this season but the ex-Nerazzurri coach feels that the two Milan clubs simply lack the quality to compete at the moment.
"I believe that Mazzarri and Seedorf need time and support from their clubs and fans," Mourinho told La Gazzetta dello Sport.
"Let's be honest, they don't have a lot of top players to build a great team in just a few months, so they need some time and support.
"I am an Interista and will always be one. I think that Mazzarri deserves the club's faith.
"Of course, I am no Milanista but I have a lot of respect for the club and their great history. I hope that Clarence will also get the chance to work in tranquillity and bring Milan back to the heights of before.
"Italian football needs the two Milan sides to be on top of their game."
Inter currently sit sixth in Serie A, while Milan are down in 10th.