I wonder what the right strategy is against Davy these days? Hit hard to the middle - take away the angles? :/
Overpower him with early hitting or pure backcourt blasting :-) eg Blake, Cilic, Federer, Soderling. Less potent guys can also pull this off on the faster courts like Cincinatti, and obviously on grass.
I suppose you could also push down the centre and slice out wide on some of the low bounce indoors courts, as he does like a bit of pace to feed off (as long as it's not overwhelming), and a low flat ball gives him very small margins for error over the net. Youzhny did something like this to him in Valencia, which was playing very slow/low. Really frustrated Davy, he couldn't get his attacking game going at all.