Napoli coach Maurizio Sarri admits they weren't at their best for victory over Chievo.

Manolo Gabbiadini and Marek Hamsik struck for the 2-0 win.

"I started Gabbiadini because I hoped that he would find the goal and he found it," Sarri told Mediaset Premium.

“The substitution with Arek Milik was not because he was doing badly, I simply wanted someone who would attack the space and hold up the ball, as the team was getting too deep.

“We still have some dips in concentration and that is something we really need to work on, because it is not acceptable. I saw errors of laziness and superficiality during the games against Genoa and Chievo."