As we saw by Rory McIlroy's emotional reaction to winning the Masters and completing the career Grand Slam, the guy was under an insane amount of pressure to finally get the job done. McIlroy admitted he felt "pure relief" after winning the playoff against Justin Rose to make (more) golf history.

Jordan Spieth out to emulate Rory McIlroy’s grand slam glory at Quail Hollow - A US PGA Championship title would see the American become the second man this year to complete the set of golf’s major titles.

Now that Rory McIlroy has completed his career Grand Slam, what is left for him to conquer in professional golf? Jim Natz has a bold answer.