(CNN) -- Spain's Alvaro Quiros charged into the third round lead at the Qatar Masters with a bogey-free eight-under-par round of 64.
Quiros made full use of a slice of luck on the ninth to record a 64.
Quiros, who is renowned for his big-hitting, holds a one-shot advantage over halfway leader Louis Oosthuizen of South Africa with a total of 16-under 200.
Maarten Lafeber of the Netherlands and 2006 Qatar champion Henrik Stenson are tied for third at 12-under after each recording 66.
Inaugural Qatar winner Andrew Coltart, who began the day three shots back of Oosthuizen in second, finished strongly with two birdies in three holes to give himself last-day hope on 11-under after a third round 70.
But the chasers will have their work cut out to catch Quiros, who is looking to add to his Portugal Masters victory last October, and Oosthuizen, who is seeking his first European Tour win.
Quiros was fortunate to escape penalty when a wayward drive on the ninth found its way up a tree.
But when he arrived on the scene, Quiros was given relief because the tree was staked and he duly made his par.
"I'm very happy," Quiros was quoted on the official Web site of the European Tour, www.europeantour.com
"I worked hard last week and it looks like the scores are starting to come."
Oosthuizen shot a 69 despite a sorry four-putt on the fifth green which cost him a double-bogey six.
World number two Sergio Garcia, Lee Westwood and Australia's Aaron Baddeley all shot fine 67s but go into the final round seven adrift at nine under and needing a major collapse from those in front of them.