German Denis struck twice as relegation-threatened Atalanta beat Sassuolo 2-1 at home on Sunday.
Torino maintained their push for European football with a 2-1 victory at Serie A strugglers Atalanta on Saturday.
Juventus closed in on a fourth straight Serie A title after a 2-0 victory over Empoli.
Napoli lost ground in the race for a place in the Champions League as they were held to a 1-1 draw at home by Atalanta.
Veteran striker Luca Toni scored in either half as Verona pulled off a surprise 2-0 win over Napoli on Sunday.
Atalanta survived the sending-off of midfielder Carlos Carmona to earn a valuable point at home to Udinese.
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