I think we expected him to be good defensively when he first arrived, after all, we were buying an Atletico Madrid player who trained under Simeone. I think what was surprising and really useful was how good he was in possession. He would relieve pressure when Arsenal was being pressed by clever passes and good dribbling. That's the part of his game that seems to have disappeared lately. He turns into trouble instead of turning away from it, and his passes are often intercepted in dangerous areas.