Real Madrid didn't have a good situation in the last game and they had many injured players. The last injured player was Vinicius Junior we know they lost players like Benzame and there is no more pressure on Vinicius Junior that's why this player wanted to play even while he was injured for his team. whi can show his responsibility to his team.
But Ancelotti and the Medical team didn't take the risk to let him play in that game.