The $300,000 (€203,340) Asian Tour event is being played on one of just three golf courses in the Southeast Asian nation, with Siem Reap the nearest town to the nation's main tourist attraction — the temple of Angkor Wat.
Groom fired eight birdies against a single bogey to lead by a shot from compatriot and roommate Mitchell Brown and
Defending champion Chapchai Nirat of
The 28-year-old Groom said he was suited by the course and gained confidence after shooting four successive birdies on the outward nine.
"I carried on the momentum from then on and Im happy with my opening round result," Groom said.
Brown needs a good finish at this event if he is to retain his Asian Tour card for next year. With the top 60 finishes in the Order of Merit to receive cards for next season, Brown is currently 67th.
"This is the perfect start I need for this week," Brown said. "I hope to have a repeat run tomorrow if not its back to
The Cambodian Open is the penultimate event on the Asian Tour calendar.
Tourism is a major foreign currency earner for cash-strapped