Kwadwo Asamoah put in a great performance for Inter Milan as they moved above city rivals AC Milan into third place in Serie A with victory in a fiercely fought derby on Sunday.
The Ghanaian international was solid at left-back and lasted the entire duration of the game.
Matias Vecino fired in from close range to give Inter a half-time lead.
Stefan De Vrij nodded in to make it 2-0 before Tiemoue Bakayoko headed past Samir Handanovic to give Milan hope.
Lautaro Martinez's penalty made it 3-1, after Samu Castillejo tripped Matteo Politano, although Mateo Musacchio's 71st-minute strike made it a nervy last few minutes for Inter.
Inter now have 53 points from 23 games, two points and a place above Milan.