World No 1 Jeeno Thitikul impressed with immaculate form on the first day of the LPGA's Hanwha LIFEPLUS International Crown tournament on Thursday, while the United States beat China twice in fourball matches.
Thitikul and partner Pajaree Anannarukarn of Thailand beat Hannah Green and Grace Kim of Australia 1-up at the New Korea Country Club.
It was Thitikul's sixth consecutive win at the team competition.
Australia's Minjee Lee and Steph Kyriacou beat Chanettee Wannasaen and Jasmine Suwannapura 2-up to split the points with Thailand on the opening day.
Americans Yealimi Noh and Angel Yin routed China's Liu Yan and Yin Ruoning 5 and 4, and later Lilia Vu and Lauren Coughlin beat Zhang Weiwei and Liu Ruixin 1-up.
The US was the only team to have won both its opening matches.
Charley H