You know how there are games that seem to hinge on a single play? The fumbled pass, the mistimed kick, the ball that seems somehow lighter in Boston, the zig that should have zagged?
Today's FA cup match was not one of those games. But, if I absolutely had to point to a specific moment when things started to unravel for Aston Villa, I would say it was the instant they exited the tunnel and walked onto the pitch.
They might want to work on that.