Carragher's trained eye focused on the problems and positives in Arsenal's defence.
"Thomas Vermaelen was outstanding,'' the Liverpool centre-back said. "In the first half, he won a couple of headers at the back post just as someone was about to stick it in and he got there. Without Vermaelen, we would have been a goal up at least at half-time.
"They used to play every week. When you get injuries in that position, it's difficult to get a cohesive unit so it's something that we tried to take advantage of and, fortunately, we did."