Rickie Fowler recorded his lowest round of the year so far to co-lead the Aberdeen Standard Investments Scottish Open on the opening day.
The 30-year-old, who won the Scottish Open the last time it was staged at Gullane in 2015, went out in five-under-par 30 – including an eagle at the downhill 398-yard par-4 sixth.
• The best golfers to follow on social media
• Check out PUMA Golf's new apparel
Birdies at the 11th and 12th holes saw Fowler move to seven-under-par for his round and, with Gullane a par-70, it raised the possibility of a first round of 59 on the European Tour, with Fowler needing to birdie four of his last six holes.
Fowler's five rounds at Gullane:
— The European Tour (@EuropeanTour) July 12, 2018
66, 68, 66, 68, 64#ASIScottishOpenpic.twitter.com/acngxWzPLk
However, the American faltered with a bogey on the par-4 13th and then parred his way in.
"After yesterday and seeing the golf course in the same wind that we're seeing today, I knew it was out there to get a few in the first six to nine holes and, at the same time, you've still got to hit fairways, hit greens and make putts," said the American.
• Knox willing to alter US-dominated schedule
• Willett finally turns corner after 18 tough months
"It was nice to go out and execute early and would have been nice to get a few more on the back. The back was playing tougher coming in and could have presented some trouble but I feel like we did a good job of avoiding that."
Joining Fowler at the summit was Robert Rock - who birdied six of his first 12 holes before parring his way in - Scott Fernandez and Jens Dantorp.