Manchester United’s Johnny Evans and Newcastle’s Papiss Cisse are facing 6-match bans for spitting.
The pair appeared to spit at each other during Wednesday’s Premier League game at St James’ Park.
Referee Anthony Taylor spoke to Evans and Cisse after the first-half incident, but neither was booked.
The Football Association says it is waiting for Taylor’s report before deciding whether any action is needed.
Television replays appeared to show Evans spitting towards Cisse, who was on the ground.
The Senegal forward then appeared to spit in the direction of Evans.