Gerard Pique was booed as he trained with Spain for the first time since voicing his support for Catalan independence.

The Barcelona defender has admitted he is prepared to quit the Spanish team prior to the 2018 World Cup if requested to do so by the Spanish FA.

Pique has been an outspoken defender of the wealthy north-eastern Spanish region’s right to self-determination and cast his vote in the independence referendum on Sunday morning.

Clashes left at least 92 people confirmed injured out of a total of 844 who needed medical attention, according to Catalan authorities.