interesting debate on the first goal; Ya Ya, Ota and Delph all blamed.
I'd say Ya Ya was primarily at fault for being totally square on and not ushering the man towards the byline and slowing the attack. His mistake put Otamendi and Delph under pressure immediately. If you watch Valencia, Ota is stood with him until the man skins Ya Ya (Delph had passed him on if you watch the shape). Delph has seen this and is already on his way to intercept the cross (which he manages to do, sort of). VALencia moves away from Ota and, crucially, this is where it breaks down. Ota should have followed his man into the centre as Delph was coming across. Or do we not know all the facts? did someone tell Ota to go? and delph to stay? dunno. but on face value, ya ya put those two in a predicament which i think Ota failed to manage.