A man has been arrested after racist abuse was aimed at Junior Nsemba after Wigan's narrow victory over St Helens at Magic Weekend in Liverpool.
Wigan said the comments appeared on social media and reported the matter to the police.
A 56-year-old man from St Helens was arrested on Friday.
Wigan and Leigh Police said in a statement: "Earlier this week, and following on from Super League Magic Weekend, officers from Wigan's Neighbourhood Team were made aware of an online incident where racist abuse was directed towards one of the players.
"Following an investigation into the matter and with the support of both Wigan Warriors and St Helens RLFC we were able to identify a male who we believe may be able to assist us with our enquiries.
"Shortly before 8am this morning officers from Wigan's Neighbourhood Tasking Team arrested a 56-year-old male from the St Helens area on suspicion of a racially aggravated malicious communication offence. He currently remains in custody awaiting interview."
, as Saints' Jackson Hastings missed a kick to tie the game after the final hooter.
Wigan said in a statement: "The club is aware of racist remarks made on social media about one of our players.
"We are appalled by the comments and condemn them in the strongest possible terms. No individual should be subjected to racist abuse, whether online, in person or in any other setting.
"Racism must be called out, condemned and eradicated. We will report such matters through the appropriate channels and will work with the relevant authorities, the Rugby Football League and social media platforms to ensure they are investigated and dealt with properly."
In a statement, the RFL added: "Rugby league has a zero tolerance approach to racism and all forms of discrimination.
"We are aware of the abhorrent remarks made to Wigan Warriors and England player Junior Nsemba, which we condemn completely.
"No person should suffer racist abuse at any time or in any manner.
"As a governing body, we continue to work hard to eliminate all forms of racism and discrimination.
"We offer Junior our full support as we strive to ensure the matter is dealt with thoroughly and correctly. The alleged perpetrator is not on either our or St Helens' systems as a fan or ticket purchaser but we are working with both clubs and the police as investigations continue.
"Thankfully, such instances of racism are rare in rugby league but we aim to stamp it out completely."
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