The Associated Press

GRAND BLANC, Mich. - Catching Tiger Woods in the world rankings is no longer consuming Vijay Singh.

Singh shot a 9-under 63 Thursday to take the first-round lead at the Buick Open, with Woods lurking four shots behind.

Woods is the top-ranked player in the world, with one win and nine top-10 finishes, and Ernie Els is second. Singh ranks third, with three victories and 10 top-10 finishes.

"I put too much pressure on myself trying to get that spot in the beginning of the year," Singh said. "I just want to go out there and enjoy my game. I'm really not worried about who is No. 1 right now."

Singh, one shot ahead of Olin Browne and two in front of Mike Grob, fell two strokes short of the tournament record.

U.S. SENIOR OPEN: Peter Jacobsen, still rehabbing from arthroscopic hip surgery, made four birdies during a six-hole stretch on the back nine and shot a 6-under 65 to take the first-round lead in St. Louis. Craig Stadler had a bogey-free round and was second at 5 under. Jay Haas birdied the final two holes to cap a 67. Seven players shot 68s, including Gil Morgan.

John Aubrey and Patrick Tallent aced No. 3, a 145-yard par 3, and Mike McCullough made one at the 179-yard 13th. It was the first time three Champions Tour players had 1s in the same round.

EUROPEAN TOUR: Johan Edfors and David Howell shot 5-under 67s and were tied for the lead after the opening round of the Scandinavian Masters in Loddekopinge, Sweden.

WOMEN'S BRITISH OPEN: Annika Sorenstam's strong start was not quite as good as Karen Stupples' in Sunningdale, England.

Stupples made seven birdies in a bogey-free 7-under 65, putting her three shots ahead of defending champion Sorenstam. Sorenstam was in a group of five players at 4 under. South Korea's Jung Yeon Lee is in second place after a 67.

SKINS GAME: Annika Sorenstam and Tiger Woods will be joined by defending champion Fred Couples and Australia's Adam Scott from Nov. 27-28, in La Quinta, Calif.