Gary Neville has said Granit Xhaka broke one of Anfield's cardinal rules for visiting teams after he engaged with Trent Alexander-Arnold and appeared to rile the crowd up.
Arsenal led 2-0 inside 28 minutes at Anfield on Sunday, with Mikel Arteta's side quicker to every ball and more incisive with their passing and pressing, not allowing Liverpool a moment's peace.
However, with half-time fast approaching Xhaka was brought down near the touchline on the far side and reacted angrily to not being awarded a free-kick by referee Paul Tierney.