David Horsey shot an 8-under 63 to secure a one-shot lead after the first round of the Made in Denmark tournament on Thursday.
Starting on the 10th hole, the Englishman shot an eagle on the par-5 11th and five consecutive birdies on Nos. 13-17 to finish the back nine in 28. His one stumble was a bogey on the fifth.
Welshman Oliver Farr was one shot behind and Paul Laurie of Scotland third with a 6-under 65.
Denmark's Soeren Kjeldsen, who celebrated reaching 500 European Tour appearances, led a field of seven players at 66.