Robinho dedicated his decisive goal against Brescia on Saturday night to his newly born son Gianluca.
The Brazil international's 12th goal of the season extended Milan's lead to eight points at the top of Serie A.
Napoli's defeat to Palermo means Milan have one hand on the Scudetto with four games left.
"It's a very important goal that is worth the Scudetto," Robinho said.
"I am really happy. I dedicate it to my son.
"Playing with Antonio Cassano isn't difficult. He has impressive technique.
"We had already played together at Real Madrid and now we are doing very well.
"However, we must make fewer mistakes in front of goal."