The match at the Diego Armando Maradona Stadium seemed destined for a draw before substitute Matteo Politano made his mark just minutes after coming on, scoring the winning goal for Antonio Conte's team in the 79th minute with a left-footed shot from a tight angle.
With this victory, Napoli raised their points tally to 65, moving into second place, two points ahead of Milan and seven behind league leaders Inter, who defeated Roma 5-2.