Inter blew a 2-0 lead on Sunday night.
“The players are there, maybe [Coach Luciano] Spalletti can't make himself understood," Mazzola told RMC Sport.
“The anti-Juve? These are excuses from the Coach for negative results, this team is lacking in terms of mentality.
“Spalletti can't give up, he has to keep working because it's not possible to blow a two goal lead. If he's still the person I knew then he can do it.
“As for Handanovic, I'd start with an appointment to get his eyes tested, to see if he can see properly. He needs to work on his mentality to stay focused for 90 minutes."