After leading 2-0, Napoli nearly had to return home without even a point.

Gregoire Defrel celebrated wildly after thinking he had scored a stoppage-time winner for Sassuolo but it was disallowed on video review for a foul by Domenico Berardi in the buildup.

Napoli took the lead with goals from Fabian Ruiz and Dries Mertens. But Gianluca Scamacca pulled one back for the home side and Gian Marco Ferrari leveled in the final minute.

Napoli coach Luciano Spalletti was sent off for dissent immediately after the equalizer.

Lautaro Martinez scored one goal and set up another as Inter Milan beat Spezia 2-0 to close the gap on Napoli.

Martinez assisted on Roberto Gagliardini’s opening goal in the first half and then converted a penalty after the break as the defending champion moved to within two points of the lead.

Inter took the lead with a delightful team move in the 38th minute. Following a series of passes, Danilo D’Ambrosio rolled across from the right for Martinez to backheel into the path of Gagliardini, who swept it into the bottom left corner.

Inter goalkeeper Samir Handanovic kept his side in front by keeping out Kelvin Amian’s header shortly before halftime.

Joaquin Correa saw an effort come off the underside of the crossbar for Inter early in the second half but the Nerazzurri doubled the lead in the 58th when they were awarded a penalty for a handball by Spezia defender Jakub Kiwior. Martinez slotted it into the bottom left corner.

Inter next faces Roma and former coach Jose Mourinho. Roma lost 1-0 at Bologna.