I appreciate all that Carra has done for us over the years, but I do not want him in this week. Skrtel's come on leaps and bounds this year, but based on history, he shits himself when he has to play next to Carra.
Coates might be inexperienced in the Prem', but Arsenal aren't exactly the typical English side who will beat up a young, foreign centre half. Coates has played against the Messi's etc. Van Persie's tearing everyone apart, but Coates has dealt with that before.
Even if the inexperience in English football does shine through, the chance of him making a critical error is less likely than Carra being left behind by their pace. Beyond that, if Coates fucks up, he's young enough and intelligent enough to learn from it, especially with someone like Steve Clarke helping him. Carra's both too old and too stubborn to learn from it now.