Atalanta snatched a late 2-2 draw away to Napoli amid chaotic scenes on Wednesday as Josip Ilicic scored their equaliser seconds after their opponents had a penalty appeal waved away.
Players and officials had to wait several minutes for a VAR check to discover whether the Atalanta goal would stand or whether Napoli would be awarded a penalty.
Eventually, the goal was given and the normally unflappable Napoli coach Carlo Ancelotti was sent off amid angry protests from the hosts.
Atalanta celebrated but were then forced to wait as the two incidents were checked by VAR officials before the goal was confirmed with Napoli continuing to demand a penalty. The delay partly contributed to eight minutes of stoppage time being added on.
Atalanta, Serie A's leading scorers with 30 goals in 10 games, stayed third with 21 points, three ahead of Napoli.
Instead, Remo Freuler equalised in the 41st minute with a shot which went through Meret's legs.
The hosts appeared to be coasting until the dramatic finale which will raise more questions about the use of VAR.