Mussini scored 10 points for Italy, while Sima anchored Spain's defense in the fourth quarter.
Federico Mussini and the Italians were not playing for a medal on Saturday, but Yankuba Sima and Spain were looking to advance to Sunday's 2016 U20 FIBA European Championship final.
Italy kicked off the day with an impressive payback performance against Czech Republic (who beat them earlier in the tournament), winning 81-66 in the consolation bracket. The Italians finished with four players in double figures, and they forced Czech Republic's guards into consistent turnovers with their extended pressure defense.
Mussini's squad will play Latvia in their final game of the tournament on Sunday morning at 7 a.