At the start of the summer, this seemed like something of a foregone conclusion. Casemiro looked be on his way out of Manchester United. Could there really be a more fitting Saudi Pro League signing than this fading force of a superstar? A man who won trophies aplenty alongside Cristiano Ronaldo in Spain and had been tipped to reunite with his former Real Madrid team-mate at Al-Nassr? Well, those who felt that Casemiro was destined to follow Ronaldo, Alex Telles and co did not factor in one thing. Saudi Arabian clubs appear to be shifting towards a more long-term, more sustainable model these …