Federico Dionisi came off the bench to fire Frosinone to a 1-0 victory over 10-man Bologna at the Stadio Matusa.Dionisi's seventh goal of the Serie A season leaves Frosinone just four points from safety in 19th.Bologna were reduced to 10 men in the 64th minute as defender Marios Oikonomou was sent off for a second bookable offence.The Canarini made the most of their numerical advantage, winning a penalty after 77 minutes when Paolo Sammarco was tripped by Luca Rossettini. Dionisi made no mistake as he slotted home from the spot to give the hosts all three points.