Young Australian Cassie Porter continues to impress on the LPGA Tour as she eyes a maiden victory at the Meijer Classic in Michigan.

In her second year on the premier women's tour, the 23-year-old shot a three-under 69 including six birdies at Blythefield Country Club on Saturday to be outright third, just two shots behind leader Jing Yan (68) going into the final round.

Porter, who tied for ninth in the ShopRite Classic last week and boasts four top-10s, had four birdies on the front nine in a hot start to her round.

"The back nine the greens started to firm up," said Porter.

.Also seeking a first LPGA Tour win, 30-year-old American Yan birdied the par-5 18th to cap her second straight bogey-free round to get to 14 under, one shot clear of young English star Lottie Woad (68).

"I just tried to enjoy it," Yan said. "I knew I was going to be a little bit nervous not having really been in this position before, but I have been kind of in the later tee times and there have been times where I haven't handled it very well. So, just trying to figure out what really works for me."

In Gee Chun had a 65 to get to 10 under, tied with Wei-Ling Hsu (68) and first-round leader Yan Liu (70).

Karis Davidson was best-placed of the other Australians, tied 10th at eight under after a 67, with Hannah Green (67) and Grace Kim (69) a further shot back and star Minjee Lee (73) well back at one under and tied 60th.