Rory McIlroy is coming off a stellar season.
He dominated the PGA tour and not only earned the most money, but also he sits atop the world golf rankings.
McIlroy, 23, is only getting better. He's still getting stronger and with each year of experience he becomes a tougher competitor.
However, he is a man and not a machine. While it is quite likely that he will remain in the No. 1 position for the foreseeable future, nothing is guaranteed.
With just a slight slump, McIlroy may find himself within range of several golfers.
Here are five golfers who have a chance to derail McIlroy if he leaves a slight opening.