Inter Milan lead the Serie A charts with 42 points along with Juventus but the former are ahead because of a better goal difference while Lazio are third with 36 points.
Juventus beat Sampdoria 2-1 courtesy of another Cristiano Ronaldo special to return to the top of Serie A standings.
It was the fourth successive match Ronaldo has scored in, with the Portugal international having a fantastic month after not scoring in the whole of November.
Gennaro Gattuso had a poor start to his managerial innings at Napoli as the side lost 2-1 to Parma in Serie A.
Napoli announced the news on Twitter on Tuesday, shortly after beating Genk 4-0 to end a nine-match winless run in all competitions and reach the last 16 of the Champions League.
Ronaldo put the visitors in the lead after 25 minutes from close range after Rodrigo Bentancur's assist but Juve's defense was caught off guard on a corner kick just before the interval as Felipe equalized.
The home draw left Inter only two points ahead of Juventus, which can regain the lead when it visits third-placed Lazio on Saturday.
Zlatan Ibrahimovic has played for Juventus and Milan's cross-town rivals Inter in a career that has taken him to a number of countries.
Juventus forward Cristiano Ronaldo won the top honour at the Italian league awards on Monday.
Juventus needed a Cristiano Ronaldo penalty to secure a point against Sassuolo and Inter Milan beat Spal 2-1 a few hours later to move a point above the Bianconeri in the Serie A table.
League leaders Juventus maintained its one-point advantage over Inter Milan, who won at Torino 3-0.
The club also expects an apology from Ronaldo who escaped both a fine and a ban for his reaction when head coach Maurizio Sarri took him off after 55 minutes.
Milan had the better of the chances but substitute Dybala netted 13 minutes from time to secure victory for the eight-time defending champion.
Nicolo Barella struck a stunning winner seven minutes from time after Matias Vecino had cancelled out Valerio Verre's penalty for Verona.
This Serie A season that has been marred by discriminatory slurs from the outset, Balotelli's outburst has prompted more debate.
Referee Gianluca Rocchi made the decision in the second half after Roma fans aimed anti-territorial chants at Napoli.
Atalanta remained third but slipped five points behind Juventus, which moved back to the top of Serie A — a point above Inter Milan.
The incident occurred after the final whistle of Fiorentina's 2-1 loss to Lazio on Sunday and Frank Ribery was given a red card after pushing the official twice.
Cristiano Ronaldo was rested for the match and Juventus struggled to create goalscoring opportunities.
Juventus beat Bologna 2-1 while Napoli got the better of Hellas Verona 2-0 as Arkadiusz Milik broke out of a scoring drought with a brace.
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