Thailand moved atop Pool A with a pair of wins over Taiwan, which wasn't able to sustain the momentum it generated with twin wins over the U.S. one day earlier.
Moriya Jutanugarn and younger sister Ariya Jutanugarn of Thailand teamed to beat Candie Kung and Teresa Lu 3 and 2. The Jutanugarns took the lead with birdies on the par-4 first and did not lose a hole all day.
Thailand's other tandem, Pornanong Phatlum and Onnarin Sattayabanphot, beat Yani Tseng and Teresa Lu 1 up with a birdie on the 18th hole.
Next up for Thailand: The Americans.
"We're probably going to try to keep the same confidence like today, and then just go have fun," Sattayabanphot said. "Let's see how it goes."
In Pool B, Japan's Ai Miyazato and Sakura Yokomine rallied from six holes down with seven to play to halve with Katherine Kirk and Lindsey Wright of Australia. The comeback ended with Japan capturing the final three holes.
"It feels amazing right now," Miyazato said. "Until 12 holes, I and Sakura just felt like today was Australia's day. We tried to accept the results, and said that every extra hole is just a bonus."
Kirk said, "It hurts, obviously, but we can't change what happened. But we can certainly learn from it and certainly go out there (Saturday) and try to make amends."
The tide turned after the Australians were put on the clock on the 12th hole.
"We lost our timing and that was pretty much it," Wright said. "It was just awful."
Japan's other duo, Mamiko Higa and Mika Miyazato, beat 18-year-old amateur Minjee Lee and 40-year-old Karrie Webb 3 and 2.
In another matchup, Sweden split with South Korea. Caroline Hedwall and Anna Nordqvist beat South Korea's Inbee Park and So Yeon Ryu 1 up, and Na Yeon Choi teamed with I.K. Kim to edge Pernilla Linberg and Mikaela Parmlid 1 up.