Spain international Sergio Busquets conceded it will be difficult to sort out the situation involving team-mate Gerard Pique as the Barcelona defender continues to be targeted by national team supporters.
Pique's outspoken support of Catalonia's independence referendum saw him booed by a number of fans at Spain's training session on Monday.
Political tensions in the country continue to spill into sport after La Liga leaders Barcelona defeated Las Palmas 3-0 behind closed doors at Camp Nou on Sunday amid unrest in the region, which resulted in clashes between the public and police after the central government deemed Sunday's vote illegal.