He then made three consecutive birdies on the seventh, eighth, ninth to make the turn at four under. The Gurgaon-based professional made an up and down from the bunker on the seventh and converted two long putts on the eighth (10 feet) and ninth (12 feet).
On the back nine, Digvijay had a 15-footer for eagle on the 12th but managed to salvage a birdie and subsequently picked up another birdie on the 14th. His lone bogey came on the par three 17th, where he missed a chip and putt after hitting it right of the green.
Mann started with a birdie on the first and picked up three more birdies on the seventh, 10th and 12th before dropping his only bogey of the day on the 15th. He missed a four-feet putt for par on the 15th.
The Chandigarh-based professional made birdie-par-birdie on the last three holes to finish round one in the joint lead along with Digvijay and Mukesh. Gurbaaz closed his round in style as he holed his bunker shot for birdie on the 18th.
Jaipur's Vishal Singh fired five birdies and a lone bogey to be lone fourth at four under 66 while Shamim Khan of Delhi and Bangladesh's Shahid were tied fifth at three-under 67 and Chennai's Sandeep Syal was tied for 12th after shooting one-under 69.