Napoli missed the chance to move level with second-placed Roma in Serie A as they lost 1-0 at Torino on Sunday.
Lazio remain in the hunt for Champions League football after a 3-0 win at Sassuolo on Sunday.
Antonio Candreva scored late as Lazio came from behind to beat Palermo as they aim for Champions League football next season.
Leaders Juventus were held to a 2-2 draw by struggling Cesena, missing a late chance to win the game from a penalty.
Lazio picked up three points towards their chase for European football with a hard-fought 1-0 win away to Udinese.
Genoa came out on top of an ill-tempered encounter with Lazio, triumphing 1-0 thanks to a Diego Perotti penalty.
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