The bogey-free round of Ariya Jutanugarn included four birdies Women's World Championship first round-4 A Jutanugarn (Tha), M Lee (Aus), A Olson (USA), Yu Liu (Chn), Celine Boutier (Fra ); -3 P Sung-hyun (Kor), N Hataoka (Jpn), C Ciganda (Sp), K Jin-young (Kor), F Shanshan (Chn), M Jutanugarn (Tha), J Ewart Shadoff (Eng) Other selected : -2 I Park (Kor); Level C Hull (Eng), L Ko (NZ); +1 G Hall (B), B Law (Eng); +2 N Korda (USA); +5 C Matthew (Sco). Leaderboard
Jodi Ewart Shadoff from England is one shot from the pace after the opening round of the Women World Championship in Singapore
Four shots separate the top 31 players in the 63-strong field.
Thailand's world number one Ariya Jutanugarn is one of five players in a part of the leadership at four below.
Defending champion Michelle Wie withdrew with a hand injury while Amy Yang, who won in Thailand last week, retreated with flu after three holes.
Who, 29, came back last week after wrist surgery, but she was 10 after 14 holes, including a double bogey followed by a triple bogey, before she ended her day early, without talking to reporters.
Jutanugarn tops the ranking at world number three Minjee Lee of Australia, Celine Boutier in France, American Amy Olson and Yu Liu in China.
Ewart Shadoff had four birdies and a lonely bo gey in her opening round of 69.
Charley Hull is four of the lead after an eventful 72 in which an eagle, two birdies and four bogeys, while Women & # 39; s British Open champion Georgia Hall is a battle further back with fellow Brit Bronte Law on plus-one.
Michelle Who had heavy ties around her wrist