Rory McIlroy: I'm a complete p****k the week before US Masters

World number two Rory McIlroy has revealed how the pressure of chasing the career Grand Slam turns him into a "complete p***k" during the Masters.

McIlroy needs to win at Augusta National to join Jack Nicklaus, Tiger Woods, Gene Sarazen, Ben Hogan and Gary Player in having claimed all four major titles.