We're not alone in having a shocker this weekend.    Down here in North London, I was at the Arsenal v Southampton shambles. As per usual, Arsenal all over the place,, but worth noting that their £25m defender   Kieran Tierney was to blame for many of the mistakes. He's been called out by the critics too.    ‘Where do we start? They were sloppy, so bad defensively. [Kieran] Tierney set the tone after a couple of minutes, caught on the ball, poor touches,’ - Shearer