There may not be a more punishing course on the PGA Tour than Oakmont, and while several golfers have battled their way through 36 grueling holes between Thursday and Friday, few wear their emotions as openly as Rory McIlroy.

While much ado has been made about a bitter McIlroy's resentment towards LIV Golf players, his relationship with Koepka is more of a friendship that has had its rifts.

Rory McIlroy repeated at the US Open a controversial conduct criticised by fans and media. The 35-year-old posted a 41 over his closing nine holes, ultimately signing for a four-over 74 in Thursday’s opening round.

The U.S. Open is on its final day from Oakmont Club in Pennsylvania. Defending champion Bryson DeChambeau will try to repeat as champion as World No. 1 Scottie Scheffler and Masters winner Rory McIlroy headline a strong field of golfers. Will one of those three bring home a victory? Or will it be someone else that wins the third major of the year.

Rory McIlroy suffered his worst PGA Tour finish at RBC Canadian Open, missing the cut amid equipment struggles and backlash from fans.

Something is eating Rory McIlroy. How does a guy go from the pinnacle of professional fulfillment to the petulant, club-throwing, tee marker-smashing anger ball that’s been stomping around Oakmont Country Club the last two days?