OFFICIAL: Hatzidakis won't officiate until Andy Robertson investigation ends

Assistant referee Constantine Hatzidakis will not officiate until an investigation over an alleged elbow on Andy Robertson has been completed, the PGMOL has confirmed.

Hatzidakis was approached by Robertson as the half-time whistle blew during Liverpool's 2-2 draw with Arsenal on Sunday, with the 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.

A statement from the PGMOL read: "PGMOL will not be appointing Constantine Hatzidakis to fixtures in any of the competition it serves whilst The FA investigates the incident involving the assistant referee and Liverpool defender Andrew Robertson at Anfield."

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."

After the match, Liverpool manager Jurgen Klopp was unable to cast any light on the incident.

"I know it happened but I didn't watch it," Klopp said. "If it happened the pictures will speak for themselves."

The Professional Game Match Officials Limited (PGMOL) body, which governs referees in English football, has said it is investigating the incident, as is the Football Association.

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."