Inter Milan kept up the pressure on the top two in Serie A as the defending champion won at Venezia 2-0 on Saturday.
Hakan Calhanoglu opened the scoring in the first half and Lautaro Martinez sealed the result with a stoppage-time penalty.
Third-placed Inter moved to within two points of AC Milan and Napoli.
Napoli hosts Lazio on Sunday, when Milan welcomes Sassuolo.
Venezia remained six points above the relegation zone.
Inter was full of confidence ahead of the trip to Venice, having won five of its past six matches including a midweek victory over Shakhtar Donetsk to qualify for the Champions League knockout stages for the first time in 10 years.
Both teams struggled on Saturday to create chances in the early stages and Inter’s best opportunity came in the 30th minute when Venezia goalkeeper Sergio Romero did well to parry an Ivan Perisic header.
Inter took the lead six minutes later as Calhanoglu unleashed a powerful effort from outside the area that flew into the bottom left corner.
Venezia almost leveled shortly after with a screamer from Mattia Aramu that Inter goalkeeper Samir Handanovic kept out.
Inter had several opportunities to double its lead before eventually doing so in stoppage time. Venezia goalkeeper Ridgeciano Haps was penalized for handball and Martinez struck the resulting spot kick into the bottom left corner.