Lautaro Martinez's two goals helped Inter Milan to an impressive derby win against AC Milan as they opened up a four-point gap at the top of Serie A.
The striker's early header laid the platform for a confident Inter display.
Zlatan Ibrahimovic twice went close to equalizing for Milan but the hosts were then caught out chasing the game.
A fine team move saw Martinez tap in his second then Romelu Lukaku finished another incisive counter attack with a low drive into the bottom corner.
While the normal raucous atmosphere that usually greets this fixture will have to wait until fans return to stadiums, supporters of both clubs lined the route to the ground, underlining the significance of the match.
This was the first time the sides had met while occupying the top two positions in Serie A since April 2011.
