Real Madrid midfielder Jude Bellingham was sent off for apparent dissent during the first half of the La Liga leaders' match at Osasuna on Saturday.
With Madrid leading 1-0 through Kylian Mbappe's goal, the England international exchanged words with referee Jose Munuera Montero, who then reached for his red card.
It was Bellingham's second red card for Madrid since joining from Borussia Dortmund in 2023, with the first coming last March after arguing with referee Jesus Gil Manzano following a 2-2 league draw at Valencia.
The 21-year-old played a key role in Madrid's La Liga and Champions League triumphs last season.
Real Madrid have heavily criticised refereeing in Spain in recent weeks, sending a letter to the Spanish football federation calling it "rigged".