Rory McIlroy has suffered an injury scare a month out from the defence of his Masters title.
The PGA Tour confirmed that McIlroy withdrew from the remainder of this weekend's Arnold Palmer Invitational with a back injury.
He was sitting on four-under-par heading into the third round in Orlando.
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The Grand Slam champion is hoping to win another green jacket in Augusta in April.
American Daniel Berger remains out in front after a weather affected day.
He's two shots clear of the rest at the top of the leaderboard and will return to finish his third round later today.
