Plus Arshavin will have played two tough/important games for Russia - Macedonia and Ireland - whilst Chamberlain will be fit and raring to go.
Thanks for that video Capi - the kid looks amazing! Not sure I see Juan Mata in him as you said previously. Looks a lot quicker and more dangerous in his dribbling than a player like Mata. Maybe you mean his touch and passing? - Which would be scary if he has that in his game too, because his close control when running full-tilt is crazy, which, for me, is just about the most difficult thing to deal with in football.