Getting rid of garbage like Squillaci and replacing them with good quality defenders will help things, but I don't think that by itself will make a big difference. The whole defensive organisation is a shambles, and we seem to be completely unsure about our whole defensive philosophy. Sometimes half the defenders push up, wanting to play an aggressive game, trying to catch the opposition offside, while the other half are more cautious and stay back. We've seen that in pre-season already, especially in the Emirates Cup when we were cut open quite a few times with through balls, because our offside trap failed miserably due to poor organisation. The same thing was seen against Benfica. And I'm not talking about individual errors from shit defenders like Squillaci (which was evident in all those matches) but our first choice defenders who apparently don't know how to coordinate their actions and create a unified defensive unit, instead behaving as individual defenders doing their own thing.

Wenger must take a lot of blame for this. His whole attitude suggests he doesn't really worry about defensive organisation, and it's likely he doesn't work on specialised defensive drills involving the whole team. This can explain why our midfielders are so laissez faire when it comes to tracking back. The worst example was Denilson ambling back when Man Utd scored at the Emirates in 2010.

Unless Wenger realises the importance of defending as a unit, we will continue to concede avoidable goals by the bucketload.