The Englishman tied for third in last month's Open, recording his eighth top-three finish at a Major tournament.
Westwood thinks that the course at Oak Hill complements his game and is quietly confident of challenging Tiger Woods for his maiden Major title.
He told BBC Sport: "If you're a good driver of the golf ball, then you can gain a big advantage. You can hit the driver a lot. I think there's some holes where people that maybe aren't so straight with drivers are going to be hitting an iron off the tee and probably going in with a five or six iron, but if you drive it well you are going to be going in with a nine iron or wedge and having a massive advantage.
"I've been hitting the ball pretty solidly. I played nicely tee‑to‑green last week, certainly better than even the week before at the Open. So I think it's all coming together and it's a good time to start playing well.
"The main reason for finishing third at the Open was that I putted so well. The first time I've putted well in I don't know how long. It seems to be what everybody else does every week, so that's a level of consistency that I've got to try to get to on the greens. So the idea is to play the best you can and give yourself a chance on Sunday going into the back nine and just see what happens."