As the Open Championship returns to Royal Portrush, those who say Rory McIlroy shoot a record 61 around the course as a 16-year-old remember it as the day he went to "the next level" in his career.

Shocked by the strength of the reception that greeted the returning hero at the start of the 2019 Open, McIlroy famously fired out of bounds off the tee, took eight shots to get the ball in the hole and went on to card a 79.