Manchester United were not the only European giant to concede four goals in a humbling weekend. As Erik ten Hag‘s side went down like a lead balloon at Selhurst Park – a vibrant, energetic, creative Crystal Palace side hammering a Red Devils team who looked nothing of the sort – Barcelona’s deficiencies were also exposed by another wonderfully-coached, thrillingly free-flowing outfit. One managed by a tactician who’s reputation has grown to such an extent during a historic campaign that, if reports are to be believed, he is one of those under consideration to take Ten Hag’s place in the Manche…