Napoli drew 0-0 with Torino on Sunday, their third goalless draw in four Serie A games.
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A goal from on-loan Chelsea defender Ola Aina earned Torino a 1-0 win in a rollercoaster Serie A encounter against Udinese on Sunday.
Torino coach Walter Mazzarri was left fuming with the refereeing after Nicolas N'Koulou was sent off during his side's 0-0 draw at SPAL.
Third-placed Inter Milan gave a toothless display as they slumped to a 1-0 defeat at Torino in Serie A on Sunday.
Lazio's Champions League hopes took a knock on Saturday when they were held to a 1-1 draw at home by Torino in a bad-tempered game.
Inter notched a big win over Napoli on Boxing Day, albeit one overshadowed by sad events around the pitch. Elsewhere, Roma must get it together.
Cristiano Ronaldo converted a second-half penalty as Juventus beat Turin 1-0 in the local derby.
Juventus may see the Turin derby as just another game but for Torino, their passionate and unlucky rivals, it's everything.
AC Milan goalkeeper Gianluigi Donnarumma played his 100th consecutive full Serie A game in a 0-0 draw with Torino.