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The host side huffed and puffed for much of the first half without really threatening until Billy Gilmour's deflected shot put Napoli ahead six minutes before the break, with the Scottish midfielder netting his first goal at senior club level.

Pisa drew level from M'Bala Nzola's 60th minute penalty but Leonardo Spinazzola had Napoli back in front 13 minutes later and Lorenzo Lucca scored eight minutes from time before Lorran's 90th-minute goal for the visitorsmade for a nervy ending.

Napoli has 12 points after four games, two points ahead of Juventus, which was held to a 1-1 draw at Hellas Verona on Sunday, while promoted Pisa stays second-bottom with one point.