Barca midfielder Busquets faces five-match ban

Real Madrid have claimed Busquets racially insulted one of their players (GETTY IMAGES)

Midfielder Sergio Busquets could face a five-match European ban after Uefa said it would investigate claims that he racially insulted a Real Madrid player during their heated Champions League semi-final.

"Uefa has opened disciplinary proceedings against Barcelona midfielder Sergio Busquets, who is alleged to have violated... the Uefa disciplinary regulations by directing racist abuse towards a Real Madrid player," Uefa said.

"The proceedings have been launched on the basis of evidence provided by Real Madrid."