Heading into the U.S. Open this week, Rory McIlroy has been disabused of any notion that life once he completed the career Grand Slam with that win at the Masters would be smooth sailing.

Rory McIlroy achieved the career Grand Slam by winning the Masters in April, but the Northern Irishman has been unable to replicate that form since

Rory McIlroy finally claimed another major title and completed the career Grand Slam when he emerged victorious at the Masters, but the Northern Irishman has not been at his best since