The American opened her account with an eagle at the first and added five birdies to take the turn in 29. However, while Lewis notched up another birdie at the 12th, she then bogeyed the 13th and 18th to finish on six-under-par for the day.
While able to score freely for most of her round, Lewis admitted players got punished if they erred at the Siam Country Club.
“There are tough holes that if you get on the wrong side of it,” Lewis said.
“I mean, we misjudged the wind on 13 and got on the wrong side of the hole, and then made a couple bad decisions there on 18. You know, it happens on this golf course. You get short sided, you’re going to make a bogey. Just try to minimize the damage.”
Lewis shares the lead with Yani Tseng and Brittany Lang after the opening round, and the 30-year-old says that she's feeling good about her game.
“I was pleased coming out today with the ball striking,” she explained.
”That was something those first two events that wasn’t quite there. Pleased with the way I hit it. Put a new driver in the back this week and was pretty pleased with that, too. I’m excited about the rest of the week.”