Verona remained ninth, four points below the Europa League qualifying spots.
Relegation-threatened Torino could manage only 0-0 at home to promoted Spezia, despite its opponent playing most of the match with 10 men.
Spezia midfielder Luca Vignali was initially shown only a yellow card for his sliding challenge on Nicola Murru but that was upgraded to a red on video review as the tackle was also studs-up and high.
That happened in the eighth minute but Spezia nevertheless outplayed Torino comfortably.
Torino had barely a sight of the target although it did have two goals ruled out — one for offside and another for a foul on the Spezia goalkeeper — and Cristian Ansaldi hit the post as the home side upped the pressure in the final 10 minutes.
Torino remained a point below safety and five points below Spezia.