One of the assistant referees in Liverpool's Premier League match against Arsenal has been accused of elbowing Andy Robertson during the half-time interval.
Constantine Hatzidakis was approached by Robertson as the half-time whistle blew, with the Liverpool defender insisting the assistant referee had struck him in the throat seconds later.
Robertson was given a yellow card by referee Paul Tierney for his role in the involvement, while Liverpool captain Jordan Henderson approached the officials to discuss the incident.
Sky Sports' pitchside reporter Geoff Shreeves said: "Andy Robertson was absolutely apoplectic, stunned even.
"He said 'the linesman has just elbowed me in the throat' - Jordan Henderson was well aware of it and led the remonstrations with referee Paul Tierney and after that they got taken away. Extraordinary scenes."
The Professional Game Match Officials Limited (PGMOL) body, which governs referees in English football, has said it is investigating the incident.
A statement read: "PGMOL is aware of an incident involving assistant referee Constantine Hatzidakis and Liverpool defender Andrew Robertson at half-time during the Liverpool vs Arsenal fixture at Anfield. We will review the matter in full once the game has concluded."
