Samoa centre Eliota Fuimaono-Sapolu has been charged with misconduct after he accused Welsh referee Nigel Owens of bias and racism on Twitter.
The 30-year-old criticised Owens after he presided over Samoa's 13-5 defeat to South Africa, which effectively ended their World Cup campaign.
Fuimaono-Sapolu took to the social networking site after the match to question Owens' neutrality, arguing that Wales stood to benefit from a South African victory.
The centre is charged with a "breach of the World Cup disciplinary programme and for alleged infractions of the terms of participation."
Fuimaono-Sapolu attracted controversy earlier in the tournament when he compared Samoa's short turnaround time between matches to slavery, apartheid and the Holocaust.
The case will be heard by Judicial Officer Jeff Blackett with a date and time to be confirmed.
