Mario Gomez gave Fiorentina a victory over Estudiantes in their South American tour.
The Viola began their experience in Argentina and Gomez broke the deadlock after 29 minutes, running on to a Bernardeschi through ball.
Goalkeeper Tatarusanu made several mistakes and was rescued by a Gonzalo Rodriguez goalline clearance.
There was bad news for Facundo Roncaglia, who went off with a right ankle injury in the second half.
Correa had the best chances to draw Estudiantes level, but Matias Vecino wasted a golden opportunity when firing against the upright of an open goal.
Estudiantes: Silva; Garay, Desàbato, Re, Goni; Gil Romero, Jara, Correa, Martinez; Carrillo, Auzqui
Fiorentina: Tatarusanu, Gonzalo, Roncaglia (Tomovic 61), Alonso; Piccini, Wolski (Vecino 61), Brillante, Borja Valero (Mati Fernandez 76), Vargas (Pasqual 61); Bernardeschi (Babacar 69), Gomez