Liverpool forward Luis Suarez could face retrospective action from the Football Association after seemingly biting Chelsea defender Branislav Ivanovic.
The incident occurred in the second half of Liverpool's 2-2 draw with Chelsea at Anfield on Sunday, as Suarez battled for the ball with Ivanovic in the Blues' penalty area.
Ivanovic was seen appealing to referee Kevin Friend after his tussle with Suarez, and television replays appeared to show the forward sinking his teeth into the defender's arm.
No action was taken against the Uruguay international, who was already on a yellow card after giving away a penalty for handball, which Eden Hazard duly tucked home.
The FA will now wait for referee Friend's report, and should the official not mention it, Suarez could face retrospective action.
The striker had the final say on the outcome of the game as he scored in the dying seconds to clinch a draw for his side and dent Chelsea's Champions League qualification hopes.
In 2010, Suarez, during his time at Ajax, was given a seven-match ban for biting PSV Eindhoven midfielder Otman Bakkal's shoulder.
In 2006, Tottenham striker Jermain Defoe faced no further action from the Football Association after appearing to bite West Ham's Javier Mascherano, although he was booked at the time.