Aston Villa escaped with a point from a 1-1 draw at West Ham as VAR denied the hosts a winning goal deep into stoppage time.
The officials spent five minutes checking whether Tomas Soucek's potential winner should be allowed before referee Jarred Gillet eventually came to the correct decision after going to his monitor, ruling the goal out for handball.
Nicolo Zaniolo's late goal saved Villa from defeat and moved them three points clear of Tottenham despite another lacklustre league performance.
West Ham led through Michail Antonio's first-half header and were the better side for most of the game but handed Villa a route back into the game as their levels dropped, with Zaniolo punishing them 10 minutes from time.
Unai Emery's side can feel aggrieved they were not given a penalty for a handball by Emerson Palmieri with the scores level, but they were undeserving of three points as they failed to capitalise on Spurs' slip-up at Fulham.
Zaniolo's goal could prove vital in the battle for Europe with Villa's lead over sixth-placed Man Utd up to nine points, having played a game more.