The Rugby Football League is investigating a biting allegation brought by England international Sam Tomkins.
The Wigan full-back made the claim against Castleford hooker Ryan Hudson during his side's 40-16 Super League win over the Tigers at the DW Stadium last Friday.
The incident was put on report by referee George Stoke and the RFL's match-review panel has requested more information from Wigan before deciding whether to bring any charges.
When asked about the incident in the post-match press conference, Warriors coach Shaun Wane said: "I need to have a look at that before I make a comment on it. I'd be amazed and disappointed."
Meanwhile, Hull prop Mark O'Meley and Salford loose forward Stephen Wild will appear before the RFL's disciplinary committee on Tuesday on charges of punching.
O'Meley was sin-binned for his part in the clash during Hull's 34-26 win over the Reds at the KC Stadium on Sunday but both players have been charged with minor grade A offences.
Hull KR centre Jake Webster has been given a formal caution for striking an opponent during his side's 32-26 win at Widnes.