Refereeing assemblage PGMOL volition analyse aft Liverpool's Andy Robertson appeared to beryllium elbowed successful the chin by adjunct referee Constantine Hatzidakis.
Robertson approached the authoritative angrily astatine the extremity of the archetypal fractional against Arsenal and appeared to shove him arsenic helium passed, with Hatzidakis raising an elbow which deed Robertson.
The Scot reacted furiously and, on with respective team-mates, approached referee Paul Tierney, who booked 29-year-old Robertson.
The Anfield crippled ended 2-2 with Liverpool coming from 2-0 down to gully with the league leaders.
Former Premier League striker Chris Sutton was watching the crippled for BBC Radio 5 Live and thinks Hatzidakis should beryllium punished.
"I truly don't cognize what helium was thinking. As acold arsenic I tin see, helium has to beryllium banned," said Sutton."He volition person to beryllium retired a fig of games. I can't retrieve different incidental similar this. Where is the precedent for these things?"
Sky Sports pundit Roy Keane called the Reds subordinate a "big baby" for his reaction.
"Robertson should beryllium much disquieted astir his defending," said Keane. "Just get connected with the game. He grabs the linesman first."
Robertson could beryllium successful occupation if the incidental is investigated further. Fulham's Aleksandar Mitrovic is presently serving an eight-game ban for pushing referee Chris Kavanagh successful their FA Cup nonaccomplishment astatine Manchester United connected 19 March.
Sutton added: "A large debating constituent was Mitrovic and the eight-game prohibition and the FA privation him banned for much but you can't person assistants throwing elbows. What should the punishment be?"
PGMOL's connection said it was "aware of an incidental involving adjunct referee Constantine Hatzidakis and Liverpool defender Andrew Robertson astatine half-time during the Liverpool v Arsenal fixture astatine Anfield", adding that it would "review the substance successful full".
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