Greece has complained to UEFA over an acronym used by North Macedonia at the European Football Championships.
The logo of the country's football federation (FFM) appeared on the country's shirts during their opening group stage match against Austria.
But Greek ministers have stated that North Macedonia cannot play under the acronym "MKD" and must use another term in line with the Prespa agreement, which changed the constitutional name of the former Yugoslav republic.
Foreign minister Nikos Dendias sent a letter on Sunday to his counterpart in North Macedonia, requesting the team comply with the agreement.
Dendias urged North Macedonia to use another acronym that corresponds to its official name such as "NM" (North Macedonia) or "RNM" (Republic of North Macedonia).