This app was mentioned in 2 comments, with an average of 1.00 upvote
you have to use the "Serie A TIM" app and register.
this is the android one.
There should be a page somewhere where you can purchase the matches, i can't check right now but it's in there.
I couldn't find it either in the android store through my phone so i went to google "serie A TIM streaming android app" and it found it. I think the reason i couldn't find it is because my phone is not compatible.