Wenger has stated that the defensive unit needs improving.
The transfer window is not yet shut.
Why some are seemingly worrying so much about this matter at this stage i don't know. It aint over until it's over. Many clubs are chasing CBs at the moment and there are not many of real quality available are there?
Gervinho was one of the best players in the french league last season. He promises much.
Chamakh started excellently last season. He too promises much and i believe he will prove to be a great signing in the future.
Why some are writing him off after his first season in the english game is beyond me.