Excellent job, mate.
It's only a detail, but I think that your scheme confirms just that our formation was 4-2-3-1 because Reo and Petrov were behind Delph, and Delph was almost on the same line of the wingers.
Not quite. Petrov was on a similar line with Delph. If it was a 4-2-3-1, Delph would be much further forward. Compare that diagram to the one I did for the Carling Cup final and you'll see what I mean. The positioning of the three is much more extreme in a 4-2-3-1.
You misunderstand me, I think individually they were exceptionally good TODAY (um, yesterday, come to think of it). Over the course of the season they've been pretty pathetic, as I said in the graph showing their tackles made next to the conclusion, but today, as individual defenders, they excelled.
Having a go at them over the RvP goal would be harsh really, considering it was a goalmouth scramble and they had been defending more or less for the entire game minus the first 20 minutes. Heavy Arsenal pressure would eventually pay off, but it was due to their good defending (partially) that we didn't concede more.