Azaharo Munoz, Inbee Park, Jodi Ewart Shadoff, Ariya Jutanugarn and Minjee Lee are tied for second place while Sung Hyun Park, Moriya Jutanugarn and Carlotta Ciganda are another shot back.
Olson, who copped the brunt of a social media storm last week for her part in a backstopping controversy at the LPGA event in Thailand, has shown remarkable resilience to take the lead at the Sentosa Golf Club.
Olson was asked afterwards how she had managed to refocus on the job at hand given the scrutiny she was under.
“Honestly there was a lot of support and a lot of positive. I think everyone who was involved, it was a really clear case. We didn't do anything wrong, so there was really no issue.
“It was great to come here, Monday, reset, and Tuesday, assess the game and move on to a new week.
“Same as you do every week. You just have to stick to your game plan. Tuesday is about assessing what went wrong last week, making a few adjustments. Wednesday is seeing the course again, and Thursday, you just kind of trust what you've got.”
“For me, I think it was good for me to be able to be heard, have my voice heard, and you know, because there were a lot of voices out there,” added the leader when asked if being able to say her piece on social media had helped.
“For me, it was just important to be able to say it and to move on.”
Lee, now the 3rd ranked player in women’s golf, powered through her opening nine before dropping three shots on her closing nine to finish with a round of 71 but just two behind the lead she appears set to contend throughout the weekend.
Sarah Jane Smith improved with a round of 69 to being 24th place and is the next best of the Australians while Su Oh is struggling at 8 over par and is 54th.
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