Spain's place in the 2023 Rugby World Cup in France is in doubt while it is being investigated for fielding an ineligible player.
Spain qualified on March 13 for its second Rugby World Cup, and first since 1999.
But World Rugby said on Monday it was convening an independent judicial committee to examine a possible breach by Spain in World Cup qualifying of Regulation 8, concerning a player's eligibility for internationals.
"World Rugby was made aware of a potential breach concerning one member of the Spanish national men's senior team," it said in a statement. "Having concluded initial enquiries, the international federation believes a formal independent review is warranted. The Spanish Rugby Union has been fully cooperative throughout the initial enquiries."
The review reportedly concerns South Africa-born front-rower Gavin van der Berg. He made his debut on Dec. 18 as Spain beat the Netherlands 52-7 in Amsterdam in the Rugby Europe Championship, which also doubled as World Cup qualifying. Van der Berg was a second-half replacement and scored a try.