Scotland's Scott Jamieson carded an eight-under-par 64 to lie one stroke off the first-round lead at The Championship at Laguna National in Singapore.
Jamieson holed nine birdies but a bogey on the 16th - his seventh - cost him a share of the lead alongside Thailand's Panuphol Pittayarat, who shot a blemish-free 63.
Jamieson atoned for that aberration - his only dropped shot of the opening day - by chipping in from a bunker at the 17th before ending in a four-way tie for second.
American David Lipsky, Korea's Kim Byung-jun and Quincy Quek of Singapore were with him on eight under.
Sweden's Kristoffer Broberg, Chilean Filipe Aguilar, Mithun Perera of Sri Lanka and Thailand's Arnond Vongvanij were a stroke further back after rounds of 65.
Vongvanij, one of the few afternoon starters to score well, had been tied for the lead until a double-bogey five on the eighth - his 17th - saw him slip back.
Alexander Levy, winner of last week's Volvo China Open, recovered from a triple-bogey seven on his fourth hole to post a two-under-par 70.
Jamieson said: "I've been hitting the ball well the last couple of weeks so it was nice to get a round where it all came together.
"There was just the one mistake with the three-putt on 16 but it was pretty far away and pace putting is always difficult in Asia with the grain. It's not what someone from Scotland is used to.
"But it was a great start. It's always a possibility that you might not complete 72 holes so a fast start is important."
Preferred lies were in operation on the fairways and scoring conditions proved good, but a delay at the start of play due to a thunder storm meant the first round could not be completed.
Eighteen players, the best performing of whom was India's Rahil Gangjee on five under after 15, were left to finish off on Friday morning.