Maybe he was good against Robben, but he is seriously bad generally - at least defensively. He would probably be a good back up, but he's not good enough to be a starter...
No really, I clearly remember Robben and van Persie not having too much difficulty with him, but fluffing up everything they touched. It wasn't a particularly noteworthy defensive performance. Agger and Kjær were quite a bit better.
yet that goal van persie made, was the perfect definition of a low shot, 99% of the top players who hit a ball like that, leaning back and kicking it from underneat, would have shot it out of the stadium
only ronaldo and van persie can pull of a shot like that