Manchester City may be firing on all cylinders at the moment, but there is one thing masked in all this - their lack of defending.
And there has been one culprit in particular, Martin Demichelis, Manchester City's summer signing from Atletico Madrid.
Now in writing this, I am not targeting him and saying he is a bad player. Of course, he is quite the opposite and actually very good at points.
But it is at those points when he isn't which may cause a few sleepless nights for Manchester City boss Manuel Pellegrini.
Demichelis joined the ranks of Manchester City from La Liga, although he hasn't particularly formed a formidable partnership with Belgian stalwart Vincent Kompany.
Was it the wrong transfer to make? Would a younger, more consistent defender have been better? It seems City had a lot of money ready to spend.
It's not often we question Pellegrini's judgement, but for once I am. Would he not be better to start with Matija Nastasic rather than Demichelis?
I understand both have suffered from injuries, but now are back and ready to play. But I don't think Pellegrini will take heed of my advice unless he was to see it in action.
Demichelis does have a good record in his spell so far - four clean sheets in eleven games isn't particularly bad - but it is his comical mistakes which could easily cost City dearly in the race for the Premier League title.
They were quite apparent in the Citizens' game against Cardiff on Saturday. Although City won the game convincingly 4-2, Demichelis' positioning and poor tackling did conjure up a slight problem for City.
The at-times lacklustre defence were saved by the returning Sergio Aguero, along with the beast of Alvaro Negredo.
Don't get me wrong, I haven't written this in spite, but personally I feel that Demichelis' sticky patch defensively will bite City in the behind eventually.
You're very welcome to disagree, this is only my opinion. But unless Demichelis pulls his socks up and gets his game together, question marks remain in my mind at least.
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