Immobile opened the scoring for Lazio when he converted a penalty in the 38th minute and then struck again four minutes later to give his side a 2-0 lead on Sunday , reports Efe.
The Italian forward scored the third goal in the 48th minute, while Luis Alberto netted the fourth goal just a minute later.
Riccardo Montolivo managed a face-saving goal for AC Milan in the 56th minute.
Lazio's Marco Parolo was sent off during injury time after picking up a second yellow card.
With the home win, Lazio is provisionally in third place in the Italian-league table with seven points, while AC Milan is in sixth with six points after suffering its first defeat of the season.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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