Tiger Woods. Pic/AFP

Tiger Woods admitted frustration and disappointment with slow progress in his comeback from back surgery after struggling off the tee again in Saturday's third round of the Masters. The 14-time major winner, who had not competed at Augusta National since 2015 because of nagging back issues, fired a level-par 72 to stand on 4-over 220 after 54 holes in his first major since 2015. The 42-year-old American, who underwent spinal fusion surgery last year, had notched two top-5 finishes in tuneups last month to spark "Tigermania" excitement that he was ready to again contend in majors. But he hit only 4-of-14 fairways and again struggled with iron shots on a course where he won four green jackets after having no such issues coming into the week.