Watch a truly extraordinary match, as Genoa went from 2-0 down to win 3-2 in under 20 minutes, but four of the five goals were headers.
Cagliari had taken a confident lead through a Joao Pedro penalty for a foul on Keita Balde Diao and Luca Ceppitelli nodding in a corner.
However, the Grifone turned the game around with three goals in 19 minutes.
Mattia Destro started the comeback by meeting the Andrea Cambiaso cross, then Mohamed Fares bagged a brace of headers on his debut after the transfer from Lazio.