Rory McIlroy has confirmed he will have an MRI scan on the injured right wrist he suffered during his opening round at the US PGA Championship in Atlanta.
Northern Ireland's US Open champion seemed to hurt the tendon and also his right forearm when striking an iron against a tree root on the third hole.
He still managed an even-par 70 at Atlanta Athletic Club but was seven shots off the blistering pace set by World Number Five American Steve Stricker.
McIlroy said: "I'm going to go and get an MRI scan now and see there's no damage done to it.
"It was dangerous. I thought maybe the tree root was a foot in front of the ball and thought if I could make contact with the ball and let the club go I could get away with it.
"In hindsight I would have been better to chip out sideways and still get a five. But it was a shot where I thought if I took it on and pulled it off it could have saved me a shot.
"I've obviously gone through impact.
"I held on to the club too long and jarred my right wrist and right forearm.
"It was obviously very painful after that."
A spokesman for ISM said, “The initial diagnosis shows that Rory has strained a tendon in his right wrist. He will obviously rest it tonight and he will see how it feels in the morning on the range.”
McIlroy’s is due to tee off at 8.35am in the second round on Friday.
