Hull FC forward Andre Savelio said a Wigan Warriors player used a racist remark during their Super League game at the DW Stadium on Thursday evening.
The New Zealander made the allegation in the 34th minute to referee James Child, who put the incident on report before the match continued.
After the game Savelio, 26, claimed he was the recipient of the abuse and said he will “not sit quietly” on the issue.
“I’m hopeful a camera or microphone clocked it and it’s dealt with.”
Wigan won the match 16-14 to maintain their 100% record this season.
Warriors head coach Adrian Lam said the club will “follow protocols” as more information becomes available.
“We’ve got to wait to respond to see what the allegation is and hear from Super League,” he said.
“It’s one that once we get that information from them, then we as a club will address that. It’s a difficult one because it’s just happened but we will make sure when it’s brought up we’ll take it head on.”
Hull head coach Brett Hodgson told BBC Radio Humberside: “I don’t know too much about it at the minute. I’ve heard the same things you have. We just have to wait and see what comes of that.
“If it is the case then it’s pretty disappointing.”
Earlier on Thursday, the Rugby Football League said it would join football’s social media boycott this weekend to tackle abuse and discrimination, with the sport’s governing body and its leading clubs and players taking part.