I think Martinez for the first time will go with Besic, McCarthy AND Barry to put up a strong barrier to protect our back 4. With that strong cover I'd want Barkley in there in front of them, confident that if he loses the ball we're not immediately going to be put under the cosh with an attack on our back line. I suspect though that he'd go with Mirallas and Naismith as the two more advanced MFs. Nevertheless Barkley would be handy from the bench. Too often when they've been on top, and particularly when we've gone behind against them, we've looked to the bench and realised there was nothing on it to change things round. Should we go behind, Barkley coming on would lift spirits (irrespective of his current form) and give them something different to think about.