Spaniard Alvaro Quiros shot an eight-under 64 in the third round of the Qatar Masters on Friday to take a one-shot lead into the final round. Quiros, 26, sank eight birdies to move to 16-under for the tournament, one ahead of South African Louis Oosthuizen and four clear of Dutchman Maarten Lafeber and Sweden's Henrik Stenson who share third place. “With a little bit of luck I'll be fighting for the trophy. But this is golf and you have to wait until it's your week,” said Quiros, winner of two European Tour titles. Oosthuizen, who held a three-shot lead overnight, recovered from a double bogey on the par-four fifth to record a round of 69. “I started well, but then fell asleep on the fifth green when I made a four-putt. It was a mental error, lost my concentration,” Oostthuizen said. “There are a lot of guys up there now. Alvaro shot an unbelievable round today. Stenson and Lafeber too played well and they'll definitely take the positive out of that tomorrow. “In a way I think one behind is a good spot. Three or four ahead, everyone really is thinking you have to win. One behind is nice and I'm happy with that.” Stenson found his rhythm to shoot a 66 and stay in contention to repeat his 2006 Doha victory. “Anything can happen on the last day, and if I shoot a really good score, I might have an outside chance,” he said. Perez retains lead In California, Pat Perez, in search of his first US PGA Tour title, maintained a two-shot lead Friday after three rounds of the $5.1 million Bob Hope Classic. Teeing off at the 10th hole, Perez made consistent but relatively low-key start with one birdie in his first nine holes. He then had five birdies in his second nine holes - along with one bogey - en route to a five-under-par 67. Perez's 54-hole total of 25-under 191 put him two shots in front of fellow American Steve Stricker in the five-round event. Perez started the day two strokes ahead of Briny Baird, after putting together rounds of 61 and 63 on Wednesday and Thursday for a PGA Tour record for the best 36-hole start to a tournament. Perez, 32, caught fire after his turn, with birdies at one, two, four and five. After just his second bogey of the tournament at par-four fifth hole, Perez responded with his 25th birdie of the tournament at the next. Stricker played his way into contention with a 61 for 193. Vaughan Taylor shot a 64 for sole possession of third place on 194. David Berganio (68), Chris Stroud (67), Sweden's Richard S. Johnson (67) and Jason Dufner (67) shared fourth on 195.