Relies far too much on his pace to nick a ball.
Look at his positioning on Gordon’s goal. Not only does he literally jog towards him, giving him the chance to get further forward, which Gordon takes, but then he doesn’t lay a glove on him!
Can anyone remember the last time Walker put in an actual defensive shift, as opposed to “got to the ball due to his pace”? Tackled a guy?
And, lastly, playing Dias, who is also in a slump, as the right sided defender in a 3, doesn’t help out Walker, as Dias is our most profligate defender and, to my eye, was the primary defensive link in the chain that broke, leading to both goals.