Rory McIlroy is among many to find Oakmont Country Club a bruising challenge as JJ Spaun sets the early pace on day one at the US Open.

J.J. Spaun entered the final round of the U.S. Open on Sunday within striking distance of the lead, just a single stroke back of Sam Burns at 3-under. After the second hole, however, it became clear luck wouldn't be on Spaun's side as he attempted to track down the leader.

J.J. Spaun posted a four-under opening round to take the clubhouse lead at the 2025 US Open at Oakmont, and he believes his recent costly loss to Rory McIlroy was the turning point in his career

Rory McIlroy has weighed in with his thoughts on how the final round of U.S. Open will play out at Oakmont, with Sam Burns, Adam Scott, J.J. Spaun, Viktor Hovland and Carlos Ortiz chasing glory