Langer won the title at Carnoustie in 2010 but lost in a playoff at Royal Birkdale last year.
He also led going into the final round at Turnberry in 2012, only to fade on the final day.
That seems unlikely to happen again today, given the German’s three-day master class on the sun-kissed South Wales links with earlier rounds of 65 and 66.
Langer had to settle for his third round’s fourth birdie on the 18th after missing an eagle chance from 10 feet. He dropped his only shot on the par-4 10th.
“I played very nicely, got off to a good start ... Then I maybe played a little safe for a couple of holes,” Langer said.
Rick Gibson was Langer’s nearest challenger after 66, striking for six birdies after dropping a shot at the first. Bob Tway (68) is third, another stroke back.
LPGA TOUR: In Owings Mills, Md., Inbee Park and So Yeon Ryu both birdied the first playoff hole as South Korea eliminated the top-seeded United States and earned a wild-card berth in the final round of the International Crown.
The Koreans will join Spain, Thailand, Japan and Sweden today in a duel for title.
After the American team of Cristie Kerr and Lexi Thompson beat sisters Ariya and Moriya Jutanugarn 3 and 2, Thailand’s Pornanong Phatlum and Onnarin Sattayabanphot edged the team of Paula Creamer and Stacy Lewis 1-up to leave the U.S. in third place in Pool A and out of the tournament.
EUROPEAN TOUR: In Moscow, David Horsey and Peter Whiteford share the lead, four shots clear of their nearest rivals, heading into the final round of the Russian Open.
Horsey shot 2-under-par 70 to reach 13-under 203 and was joined by Whiteford, whose 66 was the best round of the day.
Former Augusta State star Scott Jamieson (69) is in a three-way tie for third place at 9-under. James Heath, another former Jaguar, had 71 and is tied for 26th place at 214.
WEB.COM TOUR: In Overland, Kan., Zack Sucher shot 7-under-par 64, making eight birdies in a 10-hole stretch to maintain his lead in the Midwest Classic. He is at 20-under 193.
Aaron Watkins also had 64 and is three shots back.
Former USC Aiken star Roberto Diaz and ex-Augusta State All-American Henrik Norlander are tied for 64th place at 210. Diaz had 69 on and Norlander shot 70.