This is the first time the 40-year-old Zlatan Ibrahimovic has started since December 19 when Milan met Napoli at home.
The last time he scored was in the match before that, away against Udinese.
Today's goal is his eighth in Serie A this season.
If Milan wins today's match, they will go against local rival Inter and up in the league lead.
But then they have played two more matches.
The match is in progress.