Wang, three behind with three to play, benefited from a double bogey and a bogey from Siddikur on 16 and 17 and then himself birdied the 18th, as Siddikur's shot from the grassy area to the right of the green hit the flag and rolled past.
He missed the return putt for birdie, while Wang came out of the bunker perfectly and rolled in his five-foot birdie putt.
Gangjee was done in a by a late double bogey on 16th and that cost him a chance of a Top-5 finish. At one point Gangjee was three-under through 15 holes for the day and had the best round of the day.
But on 16th, where the players hit into the breeze, his drive landed on a thick rough from where he managed only to hit the ball high and into the bushes and trees on the left, forcing him to take a 'lost ball'. He ended with a double bogey and finished the day at one-under 71, the joint second best round of the day, and a total of three-over 291.
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Gangjee was happy despite a lot of lip-outs and missed putts this week.
"I always enjoy coming to Mauritius. It's half my home because my mother is from Mauritius. It's great to have her coming out to support me. I sank a 15-footer for birdie on fourth. It was like the fastest putt I ever hit in my life," he said.
As for the double-bogey on 16th, he said, "I should have hit three-wood in but I hit a rescue instead. It just popped up and that was the end of it.