RORY McILROY is leaving no stone unturned in his bid to overcome ‘impossible’ Oakmont and prosper at the US Open.

McIlroy is looking to shake off a hangover from his US Masters triumph in April.

But it 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 and shot an 81 in Monday’s practice round.

McIlroy joked: “I’m glad we have spotters up there because I played last Monday and you hit a ball off the fairway and you were looking for a good couple of minutes just to find it.

“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.