I haven't read the match or verdict threads for todays game, so maybe this has been covered elsewhere. Since Nuno arrived Coady has always been the first name on the team sheet, and the general consensus has always been that he can only play in the centre of a back 3, that he is not suited to a 4. So we switched to a 4 and Coady did "okay", but we are leaking too many goals and he is not a centre-half. His positioning has to be different, his responsibilities are different - he is learning on the job. And he can be bullied by big centre forwards.
Obviously his influence on those around him cannot be ignored, but are we witnessing the end of the Coady era? Boly and Saiss are more natural defenders, in a 2 or a 3, and Saiss can play in the middle of a 3.
I am not advocating one way or the other, but it could be argued that Coady is not good enough to play in a back 4 - that we should either stick with a 3, not play him, or move him into midfield.
Also we have been very unlucky with deflections - just half an inch could have been enough to turn a shot round the post instead of into the corner.