Carnoustie experience key
Choi used his experience of earning a share of eighth in The Open at Carnoustie in 2007 to safely navigate the next three holes before closing with a bogey to secure his maiden major title.
“It's unbelievable, today's game,” he said. “I prayed all week. Either way I started very nervous and some speed was off, which was the difference, and I made three bogeys after six. I kept my attention and prayed. I felt more comfortable in the swing.
“I made a bad start but then seven and eight was better and then made birdie on nine, which made me feel better. The back-to-back birdies on nine and ten gave me real momentum today.
“This event is historical in Korea (to be the) first-time champion at the Senior Open. I’m very proud this week.”
Australian Green extended his excellent run of form in the senior majors by securing his third top three finish of the season while England’s Broadhurst finished two shots further back in third on six-under.
Canadian Ames finished fourth on three-under-par while seven players finished in a tie for fifth on two-under, including former Ryder Cup Captains Thomas Bjørn, Pádraig Harrington and Bernhard Langer.