Nicolas Colsaerts and Haydn Porteous set the clubhouse target on a low-scoring first day of the Turkish Airlines Open.
The European Tour rolled into Regnum Carya Golf & Spa Resort with an elite field playing for a prize fund of seven million US dollars in the sixth Rolex Series event of the season.
Porteous already has a win under his belt this season at the D+D REAL Czech Masters and produced a bogey-free effort to get to seven under alongside big-hitting Belgian Colsaerts, whose best result of 2017 so far was a tie for third at the BMW PGA Championship.
BMW International Open champion Andres Romero was then in the clubhouse at six under with Kiradech Aphibarnrat, Padraig Harrington, Joost Luiten and Matthieu Pavon all also a shot off the lead playing their back nines.
South African Porteous was out in the first group off the 11th tee and set the early pace, with birdies on the 11th, 12th, 13th, 15th and 17th.
The two-time European Tour winner was putting beautifully and needed to save par from around 12 feet on three occasions, also adding further birdies on the fifth and with an excellent tee-shot into the par three eighth.
Colsaerts was another early starter in the first group off the first and he made birdies on the fourth, seventh, eighth and ninth to turn in 30.
An eagle on the par five 12th saw him hit the front and he looked to pull away with gains on the 13th and 15th before a poor tee-shot on the next led to a dropped shot.
Argentinian Romero claimed his first European Tour win in ten years as a tournament invite in Germany and is clearly enjoying life back on Tour.
He birdied the fourth and bogeyed the sixth but then made three birdies in a row and added another on the 11th before eagling the 12th. He was in a share of the lead after a birdie on the 15th but then dropped a shot on the next.
Thai Aphibarnrat, Ireland's Harrington and Dutchman Luiten were all bogey-free in their first 15 holes with Frenchman Pavon having played one less.
Paul Dunne and Eddie Pepperell were then at five under.