Kyle Sinckler could miss the British and Irish Lions' deciding Test against South Africa after being cited for an alleged bite on Franco Mostert.
The incident occurred during the 64th minute of an ill-tempered second Test in Cape Town, a game the hosts won 27-9 to level the series at one apiece.
England prop Sinckler has come off the bench in both Tests so far but would face a minimum ban of 12 weeks if found guilty.
The 28-year-old will attend a World Rugby hearing via video conference on Tuesday.
In a statement, World Rugby added there were no additional citings from the match after Lions full-back Stuart Hogg denied allegations that he had bitten Springbok counterpart Willie le Roux.
"I would never bite an opponent and I am annoyed and upset by this unsubstantiated accusation. I've always been proud of playing rugby in the spirit of the game," Scotland international Hogg said in a statement issued by the Lions.
The third and final Test between the teams takes place at Cape Town Stadium on Saturday.