A shot behind Bubba Watson and off the front edge of the 18th, Varner’s hopes had looked to have slipped away.
Undeterred, the US golfer hit a winding, weaving putt that eventually found the hole to clinch a dramatic win at the Royal Greens Golf and Country Club.
It sparked jubilant scenes from Varner, who embraced his caddy Chris Rice as they celebrated on the green.
The 31-year-old Varner had to fend off a stacked field in what is the Asian Tour’s flagship event.
It looked like Varner’s opportunity might have passed him by with Masters champion Watson top of the leaderboard heading into the 72nd hole of the four days.