Daniele Atzori was taken to hospital but did not survive, with reports saying "shameful" chants had been heard from some Fiorentina fans.
2018 ScheduleAll times ET
Inter Milan lost 2-1 to Cagliari on Friday to stay third in Italy's Serie A in a blow to their bid for a Champions League spot.
AC Milan's January signings Krzysztof Piatek and Lucas Paqueta were both on the scoresheet in a 3-0 win against Cagliari.
Local farmers have been complaining over the low price of milk in the region and have taken to destroying their produce rather than selling it.
Dark horses Atalanta moved within one point of Serie A's Champions League places by beating Cagliari 1-0 on Monday.
Nico Barella is just 21 but the Cagliari midfielder's recent performances have vaulted him to the top of transfer shopping lists all across Europe.
A stoppage-time free kick from Arkadiusz Milik gave Napoli a 1-0 win over Cagliari on Sunday to keep them eight points behind Serie A leaders Juvent
Marco Sau's 95th-minute equaliser completed a remarkable late comeback as nine-man Cagliari recovered from two goals down to draw 2-2 with AS Roma.