Chung, who started the round five shots behind in second place, overhauled overnight leader and three-time champion Matajiro Nagatomi with a closing two-over par 73to take the title. Chung's three-round total of 229 was enough to pip a fading Nagatomi, who struggled to a 79, by a shot. Akiyoshi Kubota placed third, four shots back on 233.
Prior to his win, Chung, a Hong Kong senior international and Discovery Bay member, had recorded two second-place finishes and a tie for fourth since becoming eligible to compete at senior level in 2009.
Results
229 – William Chung (78 78 73)
230 – Matajiro Nagatomi (75 76 79)
233 – Akiyoshi Kubota (81 77 75)
236 – Roderic Sage (78 80 78)
237 – Joseph Pethes (79 80 78)
239 – Edwin Lam (81 77 77), Anthony Taylor (77 80 82), Chu Koon-ching (80 75 84)
241 – Chin Young-hawk (79 80 82)
248 – Kim Suk-gul (88 81 79)