World number 16 Brooks Koepka has withdrawn from next week’s Open Championship due to injury and has been replaced in the field at Royal Troon by fellow American Colt Knost.
Koepka, who finished in a tie for 10th at St Andrews last year, said in a statement: “After much consideration, I will unfortunately be withdrawing from next week’s Open Championship.
“I have a torn ligament in my right ankle that requires additional rehab over the next couple of weeks. This is the same injury that forced me to withdraw from the WGC-Bridgestone Invitational after 13 holes.
“I have been consulting with my doctor, trainer and my entire team over the past week. We all feel this is the best decision at this time. I plan on making a full recovery over the next couple of weeks and returning at the PGA Championship.
“I wish everyone the best of luck next week at Royal Troon and I look forward to seeing everyone at Baltusrol.”
American Jon Curran is now first reserve for the year’s third major championship.