Indian Digvijay Singh carded four birdies in his last six holes to clinch the Panasonic Open India on Sunday.
Singh's bogey-free six-under-par round of 66 saw him come from behind to seal a two-shot triumph at the Delhi Golf Club.
He finished at 11-under with Gaganjeet Bhullar (70) and Siddikur (68) tying for second place with Boonchu Ruangkit carding a 67 to take fourth place.
Australian duo Wade Ormsby (73) and Kunal Bhasin (72) both had disappointing final rounds as they tied for 10 place at four-under.
Overnight leader Ashok Kumar had a day to forget with his 75 dropping him down to five-under and a tie for eighth.