Gene Sauers takes 3-stroke lead into final day of US Senior Open

Bernhard Langer waves to the crowd after his putt on the first green during the third round of the U.S. Senior Open golf tournament at Oak Tree National in Edmond, Okla., Saturday, July 12, 2014. (AP Photo/Sue Ogrocki) (The Associated Press)

Colin Montgomerie hits from the fourth tee during the third round of the U.S. Senior Open golf tournament at Oak Tree National in Edmond, Okla., Saturday, July 12, 2014. (AP Photo/Sue Ogrocki) (The Associated Press)

Gene Sauers shot a 3-under 68 on Saturday to take a three-stroke lead in the third round of the U.S. Senior Open.

Sauers had a 33 on the back nine to take control at Oak Tree National heading into the final round on Sunday. He is at 7 under for the tournament.

Colin Montgomerie, Bernhard Langer and Scott Dunlap are tied for second at 4 under.

Langer, who has dominated the Champions Tour all season, was solid, but had several potential birdies lip out during his even-par 71.

Marco Dawson, who shot a 76 on Friday, rebounded with a 69 on Saturday and is tied for fifth with Jeff Sluman and Vijay Singh.