Ghana U20 star Duncan debuts for Inter first team
Joseph Duncan played his first match for Inter's first team
The 19-year-old came off the bench before the start of the second half to replace captain Javier Zanetti and overly impressed in the game.
Duncan was involved in a fine sequence of play that saw Rodrigo Palacio finished off the Tunisian in a slick move on the 64th minute mark.
The Ghana U20 midfielder has been confirmed in Andrea Stramaccioni's first team squad for the season and handed jersey number 46.
The match played in Switzerland was Inter's final pre-season match before the start of the Italian Serie A.