Ryan Evans leads the way after the first day at the Czech Masters, his six-under round of 66 seeing him top the leaderboard by one stroke.
The Englishman, searching for his maiden European Tour victory, carded seven birdies including one at the last to claim the outright lead, with a bogey on the par-four eighth his only blemish.
Evans, last man out on the course at the Albatross Golf Resort, was three under before dropping that shot, but a run of three birdies in the next four holes assuaged his disappointment before he picked up another gain on the 18th.
Tucked in one stroke behind him are Sweden's Peter Hanson and defending champion Thomas Pieters.
Hanson went bogey-free in his 67, while Pieters, like Evans, ran into some trouble at the eighth.
After a wayward drive the Belgian took a provisional and, after finding his initial ball, took a drop and then missed a short putt to card a double bogey.
Meanwhile, there was reason to celebrate for Australian Daniel Gaunt, who aced the par-three third, holing from 227 yards with a three iron.
Jamie Donaldson, champion in this event two years ago, suffered a torrid round, carding seven bogeys and just one birdie in his 78.