In the first set, Anders Antonsen quickly took a solid lead, and there was never any doubt about the outcome of the opening set.
The tide turned slightly in the second set, with Jason Gunawan from Hong Kong taking a four-point lead at 12-8.
Anders Antonsen managed to turn it around and take his first lead in the second set at 14-13. But Jason Gunawan did not give up and edged ahead 17-16 before Antonsen took the rest of the points.
With five successive points, Anders Antonsen safely advanced to the round of 16 in the tournament.
While Antonsen advanced, Magnus Johannesen was eliminated after a single match. The Dane, who is ranked 39th in the world, lost in two sets to Lee Cheuk Yiu from Hong Kong, the world No. 23.
In the women's singles, Amalie Schulz booked her ticket through to the next round. The Thailand Open is a Super 500 tournament and not one of the biggest tournaments during the season.