World Rugby has opened an investigation into the alleged racist slur directed at England flanker Tom Curry by South Africa hooker Mbongeni Mbonambi in Saturday’s World Cup semi-final.

Curry claimed to referee Ben O’Keeffe in the second quarter of the Stade de France clash that he had been called a “white c***” by Mbonambi.

“World Rugby takes all allegations of discriminatory behaviour extremely seriously,” a statement read.

“We can confirm that we are formally reviewing the allegation made by England’s Tom Curry in relation to the use of discriminatory language during the England versus South Africa Rugby World Cup 2023 semi-final on Saturday.

“World Rugby will not be making further comment until the conclusion of the process.”