Preston's Darnell Fisher could face an investigation for appearing to grab the genitals of an opponent.
The PA news agency understands the Football Association is aware of the alleged incident, which occurred as Preston prepared to defend a corner, and will look into it.
The governing body will decide on its course of action after receiving referee David Webb's report.
Earlier this year, England rugby union international Joe Marler was banned for 10 weeks for a low grab on Wales captain Alun Wyn Jones in a Six Nations match.
In Super League, St Helens' Tommy Makinson was suspended for five matches in August for grabbing the testicles of Castleford's Liam Watts.