He hasn't really been 'shown up'.
I've never watched a game with him in it and thought 'f me he's awful'. I've seen him play, and just took the player for what he is. A bang average player as a back up.
Now I don't particularly want the player her. I'd much rather prefer us to go out and get somebody like Veltman who could fill two positions very well - and combine that with a top-class CB signing - but if the manager wants Martina to come in purely as some added competition for little cost then I trust his judgement.
It's just a bit 'meh'. He isn't a 'great signing', he'd just be there to add a bit more competition for the young lads. Holgate has had a torrid last few games and Kenny has had two PL appearances in his career, so I'll reserve judgement until we see more.