At fault for 2 of the 4 goals today, IMO. Too raw, too early for him in pressure games. Needs to learn a hell of a lot and nowhere near where we thought he was.
Whether he was "ready" for this level of football, as Martinez said back in August, is very debatable. There were goals scored today that simply wouldn't have been had Jags played.
If he's the right character and these types of games don't hurt him, like they do Barkley, he'll gain a lot of experience and nous this season.
Positional sense and decision making will come with time. He has the makings of a great CB but not for another season or so. He is comfortable on the ball and could learn his trade against the park the bus teams but not ready for the top teams as of yet.