Napoli overcame a torrential downpour to come from behind and win 2-1 at Genoa in Serie A on Saturday.
AC Milan scored a 97th-minute winner at Udinese through Alessio Romagnoli to regain fourth place in Serie A on Sunday.
Dries Mertens came off the bench to score a last-gasp equaliser as Napoli drew 1-1 at Roma in Serie A on Sunday.
Cristiano Ronaldo's 400th goal in Europe's top five leagues was not enough to extend Juventus' perfect start in Serie A to nine games.
Napoli moved back to within six points of Serie A leaders Juventus on Sunday, as goals from Adam Ounas and Lorenzo Insigne clinched a 2-0 win over Sassuolo.
AC Milan again dropped their seventh point from a winning position when they were held to a 1-1 draw at Empoli in Serie A.
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