Bernhard Langer leads by 1 shot

TURNBERRY, Scotland -- Bernhard Langer shot a 6-under 64 Thursday for a one-stroke lead in his bid to add a second Senior Open Championship title to the one he won at Carnoustie two years ago.

Langer picked up six birdies, reaching two par 5s in two before putting for birdies on the Alisa Course at Turnberry.

"I was very pleased with the way I played," Langer said. "Played smart. Hit some good drives, good iron shots and sank a few putts. Maybe left a couple of putts out there as well."

The Florida-based German leads Mark McNulty of Ireland, with Americans Tom Lehman and Michael Allen among those shooting 66.

Allen has enjoyed an impressive season on the Champions Tour, topping the money list with two wins this season.

"I played beautiful on the front nine, made a few mistakes in the middle, then had a great finish," said Allen, who eagled the par-5 17th and birdied the 18th. "Out here in a short-sleeved shirt in Scotland playing this wonderful course is as good as it gets."

Lehman opened with a bogey at the first but made six birdies before dropping his only other shot with a bogey at the 16th.

Tom Watson opened with a 69. He lost a playoff to Stewart Cink in the 2009 Open Championship at Turnberry, and won the 1977 Open Championship and 2003 Senior Open Championship at the course. The 62-year-old American, a five-time Open Championship winner and three-time Senior Open Championship champion, made the cut last week in the Open Championship.

"The course is there for the taking on such a beautiful day and Bernhard did that. He's that good of a player and he's in good form," Watson said. "He and his caddie, Terry (Holt), really work out how the course should be played. That's why he's so successful."

England's Roger Chapman had a 72. The Senior PGA and U.S. Senior Open winner is trying to tie Jack Nicklaus' record of three senior major victories in a season. Nicklaus accomplished the feat in 1991, winning The Tradition, Senior PGA and U.S. Senior Open.

Greg Norman, Fred Couples and Mark Calcavecchia each shot 72.