A late slip leaves Spieth facing a long Sunday at Masters

Jordan Spieth walks along the 18th fairway during the third round of the Masters golf tournament Saturday, April 9, 2016, in Augusta, Ga. (AP Photo/Charlie Riedel) (The Associated Press)

Jordan Spieth tees off on the 18th hole during the third round of the Masters golf tournament Saturday, April 9, 2016, in Augusta, Ga. (AP Photo/Matt Slocum) (The Associated Press)

AUGUSTA, Ga. – Jordan Spieth knows he could have a commanding lead when Sunday's final round at the Masters gets underway.

Instead, a round of 1-over 73 left him at 3 under and clinging to a one-shot lead over Masters rookie Smylie Kaufman, whose 69 was the best score on a wind-whipped day at Augusta — and one of only five rounds under par.

Bernhard Langer, the 58-year-old, two-time champion, and Hideki Matsuyama are another shot back.

Sunday's forecast calls for highs in the upper 60s and, for the first time this week, calm winds. In other words, good-scoring conditions.