Australian Andre Stolz shares the first-round Thailand Open lead with China's Liang Wenchong and Thailand's Pariya Junhasavasdikul.
They shot five-under-par 67s at Burapha Golf Club.
Liang is fresh from a brilliant top-10 finish in the US PGA Championship two weeks ago, Pariya narrowly lost in a play-off in the Mercedes-Benz Masters Malaysia last Saturday, whilst Stolz triumphed in a New South Wales PGA event at the weekend.
They lead by one stroke from a group of five players.
Stolz, one of Australia's finest players before injury, looked like ending the day in the lead but made a bogey on the final hole.
He has won one title on each the US PGA Tour, Nationwide Tour, and Japan Tour plus tasted victory four times on the PGA Tour of Australasia.
However, in 2005 a nagging wrist injury caused by wear and tear forced him into retirement for nearly three years. He gradually started to play again and rejoined the Tour in Australia in 2008. Last year he won the Victorian PGA Championship.
"I have been playing good lately but I hit some ordinary shots today - the putter kept me in there. I have felt a frustrated man this year whenever I have left the golf course. I have played well the last three or four months and feel like I have been building up to something good but it hasn't happened," said the 40-year-old.
He has been missing cuts on the Nationwide Tour in the United States. To regain some confidence he played in a small event in Vanuatu last week and won.
"I needed to remind myself how to win and it worked," said Stoltz, who won the 2004 Michelin Championship at Las Vegas on the US PGA Tour.
Australians Matthew Millar, Brad Kennedy and Matthew Griffin, Korean Kim Tae-kyun plus Pavit Tangkamolprasert from Thailand all shot 68.
New Zealand's Michael Hendry, winner of the Indonesia Open last month, carded a 70 along with Malaysian Danny Chia, Kiradech Aphibarnrat from Thailand, Japan's Shingo Katayama and Australia's Stephen Allan.