Portugal's Ricardo Santos has stormed home to take a one-stroke lead after the first round of the Qatar Masters, while Australian Brett Rumford is two shots off the pace.
Santos produced five birdies in the second nine of his opening round at the Doha Golf Club to finish Wednesday on seven under, one shot ahead of a group of three, which consists of England's Anthony Wall, Peter Whiteford of Scotland and Frenchman Alexandre Kaleka.
Starting on the back nine, Santos began his round with two birdies split by a bogey but settled down and was two under for the day at the half-way mark.
The 30-year-old Portuguese picked up his game on the front nine and birdied the first, third, fifth, eighth and ninth holes to card an opening-round 65, overhauling Wall, Whiteford and Kaleka.
Wall started on the front nine and was four under half-way around the course.
But the 37-year-old Englishman could only manage two more birdies on the back nine, leaving him tied for second ahead of Thursday's second round.
A group of six finished the opening day on five under, a shot behind Wall, Whiteford and Kaleka.
Rumford and Latvia's Martin Wiegele are joined by four Englishman; Simon Khan, Gary Lockerbie, Andy Sullivan and Chris Wood.
Rumford enjoyed a bogey-free round of 67 with three birdies coming on par-three holes.
Compatriots Marcus Fraser and Richard Green are a shot behind, while Andrew Dodt opened with a disappointing 73.
Martin Kaymer of Germany and Denmark's Thorbjorn Olesen are the highest-profile players in a group of 13 tied for 11th on four under.
World number five Louis Oosthuizen is tied for 47th on one under alongside the USA's world number 11 Jason Dufner.