Paul Dunne made five birdies in his first nine holes to get off to flying start on day one of the Turkish Airlines Open at Regnum Carya Golf & Spa Resort.
The Rolex Series was back as the Race to Dubai moved into its final three events and 2017 British Masters champion Dunne showed he is a man for the big stage as he opened up a two-shot lead over a group of nine players at three under.
Defending champion Justin Rose and three-time Major Championship winner Padraig Harrington were in that chasing pack, with glorious conditions greeting the players in Antalya.
Belgian Thomas Detry, Spaniard Pablo Larrazábal, Frenchman Alexander Levy, Australian Wade Ormsby, Finn Tapio Pulkkanen, South African Erik van Rooyen and China's Wu Ashun were also three off the lead.
Van Rooyen made the first birdie of the day on the 11th and further gains on the 14th and 15th handed him the early lead but he was soon joined by Irish pair Harrington and Dunne.
Harrington began his round with three birdies while Dunne had gains on the 11th, 13th and 15th.
A four-foot putt on the fifth handed Harrington the lead but Dunne joined him with a birdie on the 18th before trouble off the tee on the seventh led to a first bogey of the day for Harrington.
A second consecutive gain on the first then handed Dunne a two-shot advantage.
Rose will reclaim top spot in the Official World Golf Ranking with a win here and he made a spectacular start, holing out from the fairway on the fourth for an eagle before an 18-foot putt brought a birdie on the next.
Playing partners Larrazábal and Detry were enjoying matching rounds, with both men making birdies on the 12th, 13th and first.
Wu made a hat-trick of birdies from the fifth before going bogey-birdie on the tenth and 11th, while Levy recovered from an opening bogey with birdies on the third, fourth, seventh and ninth.
Ormsby made birdies on the 13th, 14th and second, while Pulkkanen had gains on the 11th, 12th and 14th.
There were 15 players at two under including reigning Race to Dubai champion Tommy Fleetwood.