Soldato
As it wasn't a head injury the ref isn't required to blow up and you shouldn't just play the ball out if an opponent is down as so many play act, but not sure what you mean by Frank 'The Code' Lampard, has he done something previously that I've missed?
I don't blame Villa for not putting the ball out why should they, I blame the ref as I believe Grealish fouled Christenson but they 100% shouldn't be playing the ball out unless it was clear he was in some real problems which he wasn't.
I'm neither a Villa or Chelsea fan but the blame for that goal rests entirely with Christensen. It doesn't matter what Grealish did or didn't do, you play to the whistle and it's clear as day the ref felt he had committed the foul and was giving Villa the advantage. Yet he decides to roll around on the floor in either an attempt to sway the decision in his favour or to get Villa to put the ball out.
He wasn't injured at all and how could he be? Grealish made the slightest of contact to draw the foul, nobody went in over the ball studs up and he didn't land awkwardly. He should have got up and back into position.