Inter Milan beat champions Juventus 2-0 to move level on points with Serie A leaders AC Milan on Sunday, boosting their hopes of a first league title since 2010.
Arturo Vidal got his head to a Nicolo Barella cross after 12 minutes for his first league goal for Inter Milan against his former club.
Barella added the second six minutes after the break as Inter claimed a first win over Juventus since September 2016, ending a series of seven matches without a win.
Inter are equal on 40 points with local rivals Milan, who travel to Cagliari on Monday, with Juventus fifth, seven points behind the Milan teams with a game in hand.
For Inter coach Antonio Conte it was a first win in four meetings against the club he led to the first three of their current run of nine consecutive league titles.