Frey told Inter's matchday programme: "I like this Inter a lot because I see a winning project and a competitive team.
"There are many players who have amazed me, I believe that Calhanoglu has had a wonderful evolution since he wore the Nerazzurri shirt, he has reached a level of great maturity and today he is one one of the best in his role.
"Sommer? He is a goalkeeper with great experience, a silent leader who transmits a lot of serenity to his teammates, the defensive department has great numbers and it is thanks to the whole team."
He added, "I can say that I had the privilege of wearing the Nerazzurri shirt, of playing for a great Club where great champions have passed through. I experienced magical moments... one of those that struck me most was the roar at San Siro after Baggio's brace against Real Madrid, an incredible atmosphere."