It marked Karamoah's first goal for the club.
Damiani told TMW after the game: "I haven't seen him, but I'm waiting in the carpark to congratulate him.
"It's a double satisfaction for Inter and for the boy, when you bring a player it is clear that you are pleased to see him on the pitch. He showed character and personality, took his responsibilities and made a good performance."
Damiani admits Bologna tried to sign Karamoah last month.