The Serbia international joined the Italian side from Stuttgart in January after previously playing in Italy for Fiorentina.
“Only time will tell how good Kuzmanovic can become but he has been great for us in recent games. His passing is superb,” Ranocchia told Sky Sport Italia.
The defender also mentioned that the 3-1 win over Chievo, their first victory in four matches, has helped answer some of the team’s critics.
He added: “The win against Chievo was a good way to hit back against some of the criticism we have been getting.
“It was a difficult game for us, but it could prove to be a defining moment in the season.”
Inter are currently fourth in Serie A, 12 points behind leaders Juventus.