Wenger recently corrected that statement about Xhaka being a box to box player.

http://www.squawka.com/news/wenger-x...fielder/836501

I don't see that in his game anyway. He's not mobile enough for that role. We just bought the wrong sort of player. He wasn't the sort of midfielder we needed and now we're scrambling around trying to find the right player combination to compliment him. It's a huge waste of money. Not good enough on the ball to protect it and recycle possession. Too reckless to protect the back four and pretty poor at defending anyway. A decent long pass but we can hardly take advantage of it because we usually play against a packed defence. I have no idea what we were thinking.

Too early to judge Perez. He has quality and needs more games to really judge.