Maurizio Sarri set out his expected XI. Paulo Sousa kept new signing Marco Sportiello on the bench and handed a surprise start to Sebastian Cristoforo.
Pepe Reina made a wonder-save on a Davide Astori header from a corner and Ciprian Tatarusanu punched a Lorenzo Insigne free kick onto the bar, but those were probably the best chances.
Nenad Tomovic lost the ball and let Marek Hamsik motor down the right and cross; Tomovic lost Jose Cajellon and the Spaniard headed home for the goal in the 71st minute.
A late red card for Elseid Hysaj handed Fiorentina some hope, but they never really looked like breaking through, and the match ended in shambles as Doveri completely lost control.
Goals: Callejon 71’ (ass. Hamsik)
Cards: Hysaj 67’ and 90’ (red card 90’), Insigne 90’, Sanchez 28’, Olivera 37’ and 90’ (red card 90’), Astori 45’, Chiesa 90’