Brooks Koepka finds momentum at the Masters after year of frustration

American came close to giving up the game after difficult recovery from knee injury but is in relentless form at Augusta

Twelve months ago Brooks Koepka finished the Masters by trying to put his fist through a car window round the back of Augusta National's caddie hut. He had just signed for a score of 75, which meant he missed the cut and finished in a tie for 59th. I don't even know if I should be saying this," he admitted on Friday, but I tried to break the back window with my fist."

First time it bounced right off again. So then he tried again, and it still did not break. Yeah," he said with a chuckle, I guess Mercedes makes a pretty good window."