Departing Napoli forward Lorenzo Insigne scored one goal and set up a stoppage-time winner to help his side beat Lazio 2-1 and move level on points with AC Milan at the top of Serie A on Sunday ahead of their eagerly anticipated clash this weekend.

Just as it seemed as though Pedro's late equalizer would prevent Napoli from moving top, Fabian Ruiz combined with Insigne to score the winner in the fourth minute of stoppage time. All the players, including those on the bench and the staff, ran to celebrate in front of the visiting supporters.

Insigne, who is leaving Napoli at the end of the season after 15 years to join Toronto FC in Major League Soccer, had scored the opener in the 62nd minute. He also had another goal ruled out for offside.

Napoli moved above Milan on goal difference. Head-to-head is the first tiebreaker if sides are level on points at the end of the season. Napoli won 1-0 when the two sides met in December.

Napoli was without a win in its previous four matches and coach Luciano Spalletti hit back at the team's critics after the victory.

"I would like to underline the fact that everyone was stupidly critical about this team, saying we didn't have character. They even said that this week. It's exactly the opposite," Spalletti said.

"In general there's an ugly atmosphere around Napoli, people saying that the players are soft but instead they have character. I want to see what they say now… we are fighting at the top of the table."