England's Chris Wood, is the leader with a round to go at the Commercial Bank Qatar Masters.
The 25-year-old from Bristol burst from two behind to three ahead in Doha with a spectacular third round 64 and stands at 15 under par overall.
Ryder Cup stars Sergio Garcia and Martin Kaymer were among the four overnight leaders, but they managed only 70 and 72 respectively - Garcia after going in the water with his third shot to the par five last and taking six.
The other two halfway pacesetters, Australian Marcus Fraser and Portugal's Ricardo Santos, fell back as well and joint second now are former PGA champion Simon Khan, also round in 64, New Zealand's 2005 US Open winner Michael Campbell and Swede Alex Noren.
Highlight of Wood's round was an eagle on the 548-yard 10th. The 6ft 5in world number 142 had already notched up five birdies, but an eight-foot putt lifted him clear of the field and there he stayed.
After a three-putt bogey at the 12th he came back with a six-foot birdie putt two holes later and pitched even closer on the 307-yard 16th.
Although he is chasing his first victory on his home circuit Wood did capture the Thailand Open last August.
He was fifth in the 2008 Open as an amateur, but it was 12 months later that the Claret Jug was agonisingly close. He shot a closing 67, but bogeyed the last and missed the play-off between Tom Watson and Stewart Cink by one.
Damien McGrane is the best of the Irish on six under, with Michael Hoey three shots further back.
Afterwards, Chris Wood told Sky Sports: "I thought as long as I kept myself in the mix I was going to be really looking forward to the last round, but leading hopefully gives me a bit of a cushion.
"I wouldn't say it was one of my best rounds, but I played very solid and was giving myself loads of chances."