Portrush (United Kingdom) (AFP) - World number one Brooks Koepka said he was "frustrated" and "disappointed" after several missed chances in the British Open second round on Friday left him chasing the leaders.
The four-time major champion failed to put together a string of birdies in benign conditions at Royal Portrush, settling for a two-under 69 to reach five-under for the tournament -- two strokes behind clubhouse leader Tommy Fleetwood.
"I haven't made a putt all week, so I just need to figure that out," said Koepka.
"If I can just make some putts I could have very easily been 10-under and maybe more.
"I've just got to figure it out this afternoon... Sometimes I felt like I hit good putts and they just didn't go in and other times it was just terrible putts.
"It's frustrating, you've just got to stay patient and wait your turn."
Koepka has finished in the top two in each of his last four major championship appearances, and will be the name the front-runners watch out for on the leaderboard this weekend.
But he failed to chase down Gary Woodland at last month's US Open and only narrowly held off Dustin Johnson to win the PGA Championship having taken a seven-shot lead into the final round.
"It's a little disappointing, two-under, but at the same time I'm close enough where if I play a good weekend I'll be in with a chance," the 29-year-old American added.
"You have to wait your turn, eventually you'll have a few chances and I did in the last six holes. Even 17 was a good chance and I found a way to screw that up."
Wet and windy weather is expected to hit Portrush this weekend, and Koepka said he thinks his current mark of five-under might be enough to win the Claret Jug if the conditions get really tough.
But he admitted he would much rather be in total control of the championship, saying he would "rather as many shot lead as possible".
He threatened to scare the leaders when he made back-to-back birdies on the 12th and 13th holes, but could only par his way in from there.
"I'm hanging around I guess. Just close enough. It's not where I want to be," he said.
"But I guess for not making anything, you can't really expect to be in the lead, so to be probably four or five back, it's okay.
"I'll figure it out this weekend and hopefully give them a run."