Here is where Wenger said he wants a completely defensive midfielder:
"If someone really top, top class comes up… I do not need to buy an average midfielder," said Wenger. "If someone top, top class turns up, completely defensive, we will consider it.
"If you look at the numbers you will see that Song was more of an offensive player than a defensive midfielder," he added. "Arteta can play deeper - the kind of Pirlo role - and we have Diaby who is a very strong defensive player.
"We have Coquelin who is also doing very well. I've played many games with Diaby and Wilshere [in midfield] and they were very efficient."
http://www.arsenal.com/news/news-archive/wenger-my-options-for-deeper-midfield-role
"If someone really top, top class comes up… I do not need to buy an average midfielder," said Wenger. "If someone top, top class turns up, completely defensive, we will consider it.
"If you look at the numbers you will see that Song was more of an offensive player than a defensive midfielder," he added. "Arteta can play deeper - the kind of Pirlo role - and we have Diaby who is a very strong defensive player.
"We have Coquelin who is also doing very well. I've played many games with Diaby and Wilshere [in midfield] and they were very efficient."
http://www.arsenal.com/news/news-archive/wenger-my-options-for-deeper-midfield-role

Fearful of the captains curse striking again?