The result sees Inter qualify for the knockout round of the competition.
Alvarez said: "I am very happy because I'm feeling better. I think I've played two good games, but the most important thing is that we qualified. Now we have to get back in the league."
On working with coach Claudio Ranieri, Alvarez added: "He gives me confidence, we talk a lot in training, he explains many things as do my teammates. I think it's very helpful for me.
"The next goal now is to improve and continue to play in this manner."