Inter scored against the run of play just before halftime as Hakan Calhanoglu fired a precise low shot from outside the box into the bottom corner of the net for the breakthrough.

In the 61st minute, Napoli’s second-half momentum was derailed when Nicolo Barella received a cross in the box and skilfully slalomed past two defenders before placing the ball beyond goalkeeper Alex Meret to double Inter’s lead.

Marcus Thurman sealed the points with a goal five minutes from time when he ghosted into the box unmarked to tap home substitute Juan Cuadrado’s precise cross for Inter’s third.

Inter lead Serie A with 35 points, two points ahead of second-placed Juventus after 14 matches. Napoli are in fifth spot level on 24 points with AS Roma who are fourth.