The former Asian Tour number one posted a flawless round, highlighted by seven birdies and an eagle to hold a commanding lead over Miguel Tabuena of the Philippines, Sebastian Heisele of Germany, Louis de Jager of South Africa and Adilson Da Silva of Brazil at the Heritage Golf Club.
Among other Indians -- Shubhankar Sharma (68) was T-21, while SSP Chawrasia and Shiv Kapur with 67 each were T-31, Chiragh Kumar, Gaganjeet Bhullar and Honey Baisoya with 70 each were T-44th and S Chikkarangappa (71) was T-62.
Atwal, who is the Captain for Team Asia at the 2018 EurAsia Cup, arrived late last evening after travelling 16 hours via Dubai from Kuala Lumpur, where he attended a press conference to announce his team for the match-play event against Europe next year.
The 44-year-old exceeded his own expectations by shooting 31 in each half with the highlight of his day coming on the 14th hole where he sank a huge 25-foot eagle putt.
More From This Section
His score of 62 is also the new course record at the Heritage Golf Club.
"I am pleased and shocked. I took a very long route coming here. I came through Dubai and it took me 16 hours to get here. I was tired and I didn't really expect anything. Sometimes when you don't expect much, you get a lot out of it."
Atwal replaced the course record of 65 set by Coetzee, Jeunghun Wang of Korea, Carlos Pigem of Spain and Thorbjorn Olesen of Denmark in 2015.
Major champion Louis Oosthuizen and George Coetzee of South Africa, who won this event in 2015, were bunched up in tied sixth place on matching 67s at the 1million (approximately USD 1.07 million) event sanctioned by the Asian Tour, Sunshine Tour and European Tour.