This live report will be updated throughout the Championship with details of who is leading The 153rd Open. Follow live scoring here and our live blog here. You can also watch live streams, highlights and feature videos on R&A TV.
Harris English, Haotong Li, Jacob Skov Olesen, Matt Fitzpatrick and Christiaan Bezuidenhout hold the lead after day one of The 153rd Open at Royal Portrush.
English, who has three top-four finishes in majors including a joint runner-up finish at this year's PGA Championship, briefly moved clear at five-under when he followed a front-nine 33 with birdies at 11 and 12.
However, a bogey on the 14th followed, ensuring the American dropped back alongside Li, Olesen, Fitzpatrick and Bezuidenhout, who also carded scores of 67 on Thursday.
Scottie Scheffler is among a clutch of players at three-under. The world number one birdied the 16th and 17th to move ominously up the leaderboard late in his round.
Also on three-under are Matthew Jordan, Sadom Kaewkanjana and Tyrrell Hatton.