South Africa's Ashleigh Buhai shot a seven-under par round of 65 to lead the Women's British Open on day one on Thursday. Hinako Shibuno - playing in her first major - lies joint second with Danielle Kang after a round of 66. Woburn member Charley Hull and 2016 champion Moriya Jutanugarn are two shots off the lead on five under par, along with world number two Sung-Hyun Park and Megan Khang. Ariya Jutanugarn is snapping at the heels of sister Moriya a further shot back, with world number one Jin Young Ko also on four under par. Defending champion Georgia Hall shot a bogey-free 69, while world number three Lexi Thompson remains in the mix on one-under following a round of 71.