According to the research conducted by StageUp/Ipsos, Juventus have the biggest amount of supporters in Italy.
almost 9 mln people (8.725.000) support Bianconeri, who win Serie A title for 8 consecutive seasons.
Inter are second with 3.975.000 supporters, while Milan have 3.868.000 supporters.
Napoli and Roma are the other sides that have more than 1 mln supporters.
Complete chart below
Source - StageUp/Ipsos