American Brooks Koepka looks well in contention to win the PGA Championship as he finished the first round tied third three-under par and remains in touching distance with leaders Kevin Kisner and Thorbjorn Olesen.Despite a good showing, an unexpected turn of events during the latter part of the day, took the limelight away from Koepka’s otherwise impressive display at the Quail Hollow course.The incident took place when Koepka hit a wayward tee shot on the 16th - his seventh hole of the day - which flew towards the spectators to the right of the fairway.

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The ball, unfortunately, struck a course marshal near the ropes and with a swing speed of 124mph, the blow unsurprisingly caused a nasty head wound.

The US Open champion immediately attended the marshal as he was being treated by the medical staff and as you can see in the video below, signed a glove as a kind gesture for the trouble caused.

He later stated that the event left him concerned and he wanted to get his round over and done with.

“I felt terrible about it," the 27-year-old said, as per The Independent.

“That's never fun to walk up and see somebody, you just drilled them. I drilled him in the head, which is probably the worst part. To be honest with you, I felt like crap."

Koepka revealed that the man did the funny side of the story, though, and joked he had done the American a favour by diverting the ball back into the fairway.

“He was laughing and joking when I was up there, kept telling me, "You got a good break." I was like, well, I still feel like c**p. But I got his information so I'll probably reach out to him tonight and see how he's doing. I'm sure he's going to have quite a big headache.”

The American ace bogeyed the hole but a three-under par 68 meant he still finished ahead of playing partners Sergio Garcia and Jordan Spieth.