He is a dire CB, carried by much better players around him.
But I agree with UTDs CBs they are not good enough
No way is he "dire" he is very inconsistent though.
The fact that he is the best England has to offer is shocking, especially when you look back over the last couple decades where they have had awesome defenders (Adams, Campbell, Rio, JT)
Cahill is no where near the same league as any of those, that much I cannot argue.

13 games unbeaten lucky. They had the first half we had the second, we certainly had a lucky break with the goal. 

