There were nine Juventus fans arrested ahead of the Derby della Mole with Torino, including a French off duty police officer.
The match finished 1-0 to Juve thanks to a Cristiano Ronaldo penalty at the Stadio Olimpico Grande Torino.
According to the Corriere della Sera newspaper, there were nine arrests before the game, all of them Juventus supporters, while another five were fined and released.
Among them was a French off duty police officer who was travelling on a van with another seven French supporters from the Drughi ultras group.
They are all accused of throwing fireworks and smoke bombs.
There were some skirmishes on the way to the stadium, as Juve ultras clashed with police as they tried to reach a group of Torino fans.
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