DOHA // Denmark's Thomas Bjorn shot a bogey-free 66 on Saturday to take a one shot lead into the last round of the Qatar Masters.
In a late surge, Bjorn, who is a 10-time winner on the European Tour, birdied four of the last five holes to finish on 11-under-par.
He leads from overnight leader Markus Brier, with defending champion Robert Karlsson another two shots back.
Germany's Martin Kaymer lies at one-under for the tournament after a round of 68 on Saturday, but he needs a miracle in Sunday's final round if he is to overtake Lee Westwood at the top of the world rankings.
Needing to finish in the top two, Kaymer is 10 shots off the lead.
Bjorn, who shot a 74 on the opening day before coming back with a 65 on Friday, continued where he had left off and picked up shots at the first and seventh during a front nine of 34.
A further birdie at the 14th was followed by his late birdie spree at the Doha Golf Club which gave him the lead.
"When you finish a round with four birdies in the last five, you have to walk off very happy," Bjorn said. "I played fantastic yesterday and felt comfortable this morning and felt good with the way my golf is."
Austria's Brier was level with Bjorn with a hole to play, but leaked his drive right, took four to reach the green and two-putted for a bogey on the par five 18th.
"It was a lot of good things, except the par 5s which I had two bogeys and two pars, which is not normally what you want to have," Brier said. "But the rest was really good. I hit a few really good shots and really good putts.
"Still up there. Not in the lead but no, the rest was pretty good, and so I'm looking forward to tomorrow."
Karlsson is on eight-under par after a superb inward nine of 31 included five birdies in six holes.
"I didn't play particularly bad on the front and I didn't really get it going," he said. "I was just a little bit off and when I was off, it would just got wrong way and when I got a better chance, I missed it. So there we go."
In fourth place is South Africa's Thomas Aiken. who shot a three-under-par 69 for an aggregate of seven-under 216.
Both England's Richard Finch and 2009 champion Alvaro Quiros of Spain, who also shot a 66 on Saturday, are tied for fifth at six-under.