Fiorentina have completed the signing of attacking midfielder Ruben Oliveira from Lecce. The Uruguay international passed a medical today before penning a deal that will keep him with the Tuscan outfit until June 2014. \"Fiorentina announces the permanent signing of Ruben Oliveira from Lecce,\" the club announced in a statement. The former Juventus player has made 12 league appearances for Lecce this season and could make his debut with in Wednesday\'s encounter at Bologna. Oliveira becomes Fiorentina\'s third reinforcement in the winter transfer window following the arrivals of midfielder Guido Pizarro from Lanus and forward Carvalho Amauri from Juventus.