Luca Antonini scored deep into stoppage-time as Genoa beat Juventus 1-0.
Genoa came from behind to beat 10-man Chievo 2-1 in Verona on Sunday and spoil Rolando Maran's first game in charge.
Arturo Vidal and Fernando Llorente scored as Serie A leaders Juventus beat Palermo 2-0, while Napoli won 6-2.
Andrea Bertolacci's first goal in 23 Serie A matches was not enough for a win as Genoa drew 1-1 with Empoli.
Leonardo Bonucci struck the winner four minutes from time as Juventus ended Roma's perfect Serie A run with a 3-2 win.
Alessandro Matri's last-gasp goal for Genoa condemned hapless Parma to a fifth defeat in six Serie A games.
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