U.S. Open is upon us, and the world's best golfers are at Oakmont Country Club for what should be a thrilling tournament. The United States Golf Association (USGA) loves to flaunt the U.S. Open as the greatest test in golf.

Even world No. 1 Scottie Scheffler knows he'll be at the mercy of Oakmont Country Club at the U.S. Open, a course he called "probably the hardest golf course that we'll play."

Scottie Scheffler may not have been as prepared as he could have been for last year's U.S. Open, but on Tuesday the tournament favourite at Oakmont Country Club said he was well-rested and had done his homework ahead of golf's toughest test.

Oakmont Country Club is known to provide some of the most ridiculous shots and mind-blowing course features in all of golf.

The US Open organizers worked hard to bring in several marquee groups that are sure to keep all fans on the edge of their seats.

The Local Rule allows for half of Oakmont's ninth green closest to the clubhouse, the back half if playing the hole, to be used before a round without penalty. That section of the green—which is still considered part of the ninth green from a competition standpoint—is defined with blue stakes and a blue dot at roughly the halfway point.

The defending U.S. Open champion has a new set of irons in his bag. Discover what we know about Bryson DeChambeau's new gear.