I'm not quite sure what you mean but all three show regular news programs which always feature sport. As for Serie A coverage its very limited, only a highlights show on Sunday afternoon.
There should also be some Inter friendlies on Rai over the summer.
Rai International shows Il Giostra del Gol which features a match every Saturday after and Sunday morning during the season..The thing that sucks is that you dont know until game time which team they will show..