Rory McIlroy may be battling fatigue when he continues his five-week trans-Atlantic playing schedule in Europe over the next fortnight, but the world No.1 has shrugged off any talk of burnout ahead of next month's U.S.

Open.

After his runaway seven-stroke victory at the Wells Fargo Classic on the PGA Tour on Sunday, McIlroy plans to get as much rest as possible before he starts the defence of his BMW PGA Championship title this coming week.

"I'm going to try to get a lot of sleep between now and teeing it up on Thursday at Wentworth," said McIlroy who will also contest the Irish Open, before taking two weeks off prior to the US Open at Chambers Bay in Washington State.

The 26-year-old has never seen the course but scoffed at a recent statement by US Golf Association executive director Mike Davis that only a couple of practice rounds were required to have a chance of winning.

"What's Mike Davis's handicap?" asked McIlroy when informed of the official's comment.

"I'm going to go up a little early . . . so I'll probably play three practice rounds. It's a bit of an unknown, so you have to prepare, but I think you can fall into the trap of trying to over prepare.

"If you don't go out and execute, all that preparation doesn't mean anything, so I'd rather have my game in good shape going in there and play practice rounds the way I usually would. I think that will do well for me."

If McIlroy continues to play as well as he did in Charlotte, he will be tough to beat no matter how well or otherwise he knows the course.