While he believes McIlroy is the world's most gifted golfer but suggested that he's "bored" with the sport, adding that not having Tiger Woods to compete with has had a negative impact on the 28 year-old.
It might not be the end of this particular spat, however, it is the end of McIlroy in this year's US Open.
Elkington then attempted to dismiss McIlroy as a "money guy" (although we're sure he would have gladly accepted the winnings if his career had been more successful). "Jack [Nicklaus] won 18 and never mentioned his total cash", Elkington responded.
"That's why jack designed 100's of golf courses...and it's knew...mustn't have taught grammar in the 50's", McIlroy replied.
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McIlroy birdied four of his last six holes in Wisconsin, but still missed the cut by four shots.
"Even though it's very disappointing to not be here on the weekend, I think these last two rounds will serve me well going into the summer".
The US Open was only his seventh appearance of the year, following two lay-offs caused by a rib injury plus a few weeks away from golf to celebrate his wedding to American beauty Erica Stoll.
"The worst thing I can do is go and force it because that's not my game". McIlroy was far from the only star to suffer at the U.S. Open, as Dustin Johnson, Jason Day and Jon Rahm also failed to reach Saturday play.
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