Rory McIlroy is leaving no stone unturned in his bid to overcome an "impossible" Oakmont course and prosper at the US Open.
McIlroy is looking to shake off a hangover from his US Masters triumph in April, where he completed his 11-year quest for a career grand slam of winning all four majors.
That will not be easy at the unforgiving Oakmont Country Club in Pittsburgh, characterised by notoriously thick rough, especially as the 36-year-old is battling driver issues.
He missed the cut when the US Open was last played here in 2016, but has been putting in the work ahead of Thursday's first round.
He played at the course on a scouting mission last Monday, but probably wishes he had not bothered, as he shot an 81, while he has also been watching videos of Dustin Johnson's win here nine years ago.
"I'm glad we have spotters up there because I played last Monday just in Druck's [member Stanley Druckenmiller] outing, and you hit a ball off the fairway and you were looking for a good couple of minutes just to find it," he said.
"It's very penal if you miss. Sometimes it's penal if you don't miss. But the person with the most patience and the best attitude this week is the one that's going to win.
"There's definitely been a little bit of rain since I played. Last Monday felt impossible. I birdied the last two holes for 81. It felt pretty good. It didn't feel like I played that bad.
"It's much more benign right now than it was that Monday. They had the pins in dicey locations, and greens were running fast. It was nearly impossible.
"If you put it in the fairway, it's certainly playable. But then you just have to think about leaving your ball below the hole and just trying to make as many pars as you can.
"You get yourself in the way of a few birdies, that's a bonus."
McIlroy told RTÉ Sport's Greg Allen he is somewhat content with his own game going into the third major of the year, as he looks to find the form that won him the green jacket.
He missed out on the weekend at the Canadian Open, something which could turn out to be a blessing in disguise.
He explained: "I feel good. I feel like last week was a good reset and a good sort of reminder that I need to get back into my process. I need to start doing the things I had been doing all year again.
"I had a really good weekend to practice at home. I feel like I've finally settled on what I want to do off the tee. You don't want to miss cuts, but as missed cuts go, it wasn't a bad one to miss last week.
"I liked what I saw on the course today from the nine holes that I played.
"I hit it great on the range. But practice rounds and driving ranges are a bit different than tournament golf. But I'm slowly building confidence with it, which I think is a good thing."
The club's own website labels it "The Ultimate Examination of Championship Golf", but it is fair to say other descriptions of Oakmont have not been so flattering.
Bryson DeChambeau, who pipped McIlroy to the title last year, called it the "toughest golf course in the world right now".
"You have to hit the fairways, you have to hit greens, and you have to two-putt, worst-case scenario," he said.
"When you've got those putts inside 10 feet, you've got to make them. It's a great test of golf.
"I think everyone knows it's the toughest golf course in the world right now."
World number three Xander Schauffele thinks fans will get pleasure from seeing the top stars suffer.
"I don't think people turn the TV on to watch some of the guys just hit like a 200-yard shot on the green, you know what I mean?" Schauffele said.
"I think they turn on the US Open to see a guy shooting eight over and suffer. That's part of the enjoyment of playing in the US Open for viewers."
