Chelsea players surrounded the referee after they were denied a spectacular stoppage-time winner against Aston Villa.
Axel Disasi thought he had netted the winning goal at Villa Park after heading the ball beyond Robin Olsen to complete a dramatic comeback and put Chelsea 3-2 in front.
However, as the Chelsea players returned from celebrating with the traveling supporters, referee Craig Pawson was urged to go over by VAR and look at his pitch-side monitor for an incident leading up to the goal.
Benoit Badiashile appeared to shove Diego Carlos in the back as the ball was dropping into the box, before it was crossed into Disasi to head home from close range.