Bryson DeChambeau and Rory McIlroy, recent U.S. Open rivals, struggled in challenging weather conditions during the initial round of The Open at Royal Troon, with DeChambeau shooting a 5-over 76 and McIlroy a 7-over 78. DeChambeau's game was marred by early mistakes and difficulties adjusting to the wind, while McIlroy faced his challenges on the back nine. Despite DeChambeau's occasional highlights like a lengthy eagle putt, both players faced significant setbacks, with DeChambeau expressing unfamiliarity with the conditions at Royal Troon. This disappointing start marks a stark contrast to their recent strong performances, raising questions about their ability to contend in the British Open.