Joao Mario has found life difficult at Juventus since completing a move to the club from FC Porto during the summer transfer window. The defender arrived with expectations that he would be able to match or replace the impact of Costa, but that has not materialised. Luciano Spalletti has shown little confidence in him, and Mario has struggled to earn regular opportunities in the Juventus side. Without consistent minutes on the pitch, the defender has been unable to build rhythm or demonstrate his qualities. Joao Mario (Photo by Marco Luzzani/Getty Images)Transfer Interest and Potential ExitInterest has now emerged from elsewhere in Serie A. Fiorentina and Sassuolo have both been linked with a move for the defender during the current transfer window, with both clubs monitoring his situation closely.