Siddikur Rahman took advantage of a late collapse from Andrew Dodt to claim the third round lead at the AfrAsia Bank Mauritius Open.
Dodt came into the day with a three-shot lead and had extended that to five at one point but he came home in 43 to sign for a 77 and open the door for the rest of the field.
Siddikur capitalised as he recorded a 69 at Four Seasons Golf Club at Anahita to get to seven under and open up a one-shot lead over Trophée Hassan II champion Jeunghun Wang, with Dodt and Nicolas Colsaerts both four shots off the lead.
Australian Scott Hend was then at one under after a 69, a shot clear of South African Brandon Stone whose 68 was the low round of the day.
A win for Siddikur would be his first on the European Tour while victory for Wang would be his second in as many weeks after his triumph in Morocco just six days ago.
"I really enjoyed my round today," said Siddkur. "It was a very special day for me."
I am very inspired to play tomorrow now that I am in the lead. I won't put pressure on myself - Siddikur Rahman
"I am very excited and I will try to enjoy myself tomorrow. One more day to go. Nothing's going to change. I'll just try and play the same way as I did for the last few days. I am looking forward to playing in the leader group again tomorrow."
Things started well for Dodt and when he put approaches close on the sixth and seventh for birdies and Wang dropped a shot on the eighth, the Australian led by five.
The South Korean had earlier birdied the second and he picked up a second gain of the day on the ninth before adding another on the tenth. Dodt bogeyed the same hole to see his lead slip to two shots and the leader ran into big trouble on the 13th.
He found an unplayable lie in a bush and had to drop into thick rough resulting in a double-bogey before another dropped shot on the next handed Wang the lead.
Siddikur, meanwhile, was keeping himself in the hunt with birdies on the first, fourth and 11th and a single dropped shot on the fifth, and when Wang bogeyed the 15th the Bangladeshi was in a share of top spot.
Dodt surrendered another double-bogey on the same hole and he dropped alongside Colsaerts, who was then within two of the lead.
The big-hitting Belgian - who is attached to the Four Seasons and had used all his local knowledge to fire a brilliant 65 on Friday - turned in 37 after a double-bogey on the eighth and dropped another shot on the 12th before back-to-back birdies.
More drama was to come on the 16th as Colsaerts, Wang and Dodt all dropped shots but Siddikur hit a brilliant three wood close and opened up a two-shot lead.
"The highlight today and possibly the highlight for me so far this week is on 16," Siddikur added. "I had a great drive and I hit my second shot with my three wood from 225 yards into the wind from left to right before sinking an eight-footer for birdie. That was by far my best birdie for the week."
A birdie on the last from Wang cut the gap to one and just five players will head into the final round under par as the windy conditions continue to provide a tough test in the Indian Ocean.
