The midfielder picked up a three-game ban before the international break for abusing match officials, and club president Corsi is all too aware of how his absence may begin to negatively affect his side after a good start to the season from the player.
“Saponara did something unjustifiable,” said Corsi to Rete Sport.
“He has to mature and realise that he is no longer an AC Milan player, where certain things are tolerated more,” he added.
“Saponara is too important for us as everything goes through him.
“He is proving to be a great player.”
When deciding on who else has stood out so far this season, Corsi chose one of former Empoli coach Maurizio Sarri’s players at his new club Napoli.
“I’d say he and Lorenzo Insigne have been the best Italian players so far this season.”