Gonzalo Higuain's goal has given Napoli a 1-0 lead at half time against Lazio in Serie A.
The Argentina international struck his 10th goal of the campaign after 18 minutes when he squeezed the ball home from a tight angle after good work from Dries Mertens in the build-up.
Lucas Biglia almost levelled things up with a long-range effort that flashed narrowly wide before Marco Parolo crashed a header onto the crossbar.
Luis Cavanda also wasted a good opportunity for the home side when he fired in a tame volley from around six yards out.
