AC Milan coach Sinisa Mihajlovic hailed victory over Inter Milan.
Goals from Alex, Carlos Bacca and M'Baye Niang earned the 3-0 win.
“It is certainly the greatest joy I've experienced since I started coaching. To win a Derby in such a clear manner was wonderful, as these games remain in history," Mihajlovic told Sky Sport Italia.
“I am especially happy for our President, as he finally got to enjoy this victory in the stadium. He is our First Fan and suffers when we don't do well.
“We're on a good run, beating Fiorentina and Lazio, drawing with Roma when we deserved to win. I said the second half of the season would be revenge for results in the first and so far it's going well.
“I think we won because we made the most of our scoring opportunities, though there could've been even more. I told the lads at half-time not to think we were leading and had to defend a lead, but to treat it like 0-0.
“We knew the longer the game went on, the more irritable Inter would get and they'd leave us more space to attack them. We showed the kind of clinical approach that we haven't so far this season."