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Leonardo Mancuso was with Juventus for almost 18 months, but he never played for the first club.
Juventus lost to Empoli at home in their first match without Cristiano Ronaldo.
Turin's side now has no wins and only one point from their two Serie A opening games.
Empoli's second-half win over 36-time champions was enough to secure their only top-flight victory.
Manchester United had announced that they had reached an agreement with Ronaldo to resign.
Last season, Juve finished fourth in Serie A. They started this campaign with a two-goal lead against Udinese. After Ronaldo asked to be removed from the starting XI, they ended up drawing 2-2.
Massimiliano Allegri's team was not able to threaten the Empoli goal on Saturday. Manuel Locatelli scored a goal just before the end of stoppage time.
Mancuso, a 29-year-old Juve player, had scored from close range 21 minutes into the game.
Empoli won the match against Juve to become the first league champions since 1999.
