Hannah Green rolled in seven birdies on her way to a 66 that vaulted her toward the top of the leaderboard at the HSBC Women's World Championship at Sentosa in Singapore today.

Green said last week that she was close to a win. Perhaps she was right.

The 24-year-old Perth superstar turned white hot on her first nine, the back side at Sentosa today, with five birdies, turning in 31 and grabbing a share of the lead in the $US2 million LPGA Tour event.

She was cooler on the front side, throwing in a disappointing bogey at the easy par-five fifth hole, but together with her opening 71 it put her at seven under par overall, just four shots from the lead.

Park, the former world No. 1 who is within touching distance of regaining that mantle, is at 11 under after a second-round 69.

Two other Australians, Su Oh and Katherine Kirk, are just outside the top 20 at four under par.

Minjee Lee is at two under par after a 71 today.

Green is playing for the first time in Singapore and has managed to combat the heat and humidity.

She has a specific plan for tomorrow. "I just want to make sure that I'm trying to just play boring golf I guess, fairways and greens, as much as possible and I putted really well today," she said.

"So that's going to be hard to maintain for the next two days. So that's probably the thing that I want to work on this afternoon after I've had some lunch."

Leaderboard