Rory McIlroy says he is seeking to ease the pressure on himself and enjoy his golf more as he prepares for the defence of his US PGA Championship.

The Northern Irishman has yet to win a major this year but hopes he can reproduce the form that led him to glory at Kiawah Island last year.

“This is the major where I feel like I can excel," the former world number one told RTÉ Sport.

“I had finished one shot out of the play-off at Whistling Straits, finished third at Hazeltine [and] obviously won last year, so I’ve had good results here."

Form and consistency have been big problems for McIlroy this year - but he insists those issues have no impact on how he feels going into any given tournament

“I expect to play well, there is no reason why I shouldn’t. I have played a couple of practice rounds so that’s given me a nice bit of positive momentum.

The 24-year-old admitted he plays best when he enjoys his golf but admitted he can't be too disappointed in victory fails to come again at Oak Hill.

“I just want to go out and enjoy it a bit more [and] not place as much pressure on myself. I know when I enjoy my golf, that’s when I bring the best out of myself.

“If it doesn’t happen this week that’s fine but I know that’s what I’m building towards."