No further action will be taken against assistant referee Constantine Hatzidakis following an incident involving Liverpool's Andy Robertson, the Football Association has said.
Hatzidakis had been stood down while an investigation was held after Sunday's match between Liverpool and Arsenal.
He made contact with Robertson's chin after the player approached him at the end of the first half at Anfield.
"I look forward to returning to officiating matches," Hatzidakis said.
More to follow.
- follow your team and sign up for notifications in the BBC Sport app to make sure you never miss a moment