ROCHESTER, N.Y. — Three strokes behind with six holes to play in the Wegmans LPGA, Eun-Hee Ji found a way to get around Norwegian star Suzann Pettersen.

“I thought if I chase her like this, Suzann would feel pressure,” the South Korean said after shooting a 5-under 67 to beat Pettersen by two strokes at the tricky Locust Hill course with a 16-under 272 total.

A 22-year-old in her second year on the tour, Ji won her first LPGA Tour title. Her previous best was a second-place finish behind Pettersen in South Korea in October in the Kolon Championship.

“I’m like a fly in the sky,” Ji said through a translator. “I cannot describe what I feel right now. Last year, Suzann beat me and today I beat Suzann, so now I have a confidence. … If all the tournaments are like today, I could probably win more.”

Pettersen’s three-shot lead over Ji at the start of the final round dissolved over the first three holes. Pettersen restored her cushion on No. 12, but Ji bolted in front for the first time with a 7-foot birdie putt on No. 15, where Pettersen missed a 5-footer for par. Pettersen finished with a bogey for a 72.

“I just got out-raced,” said the 28-year-old Pettersen, who won five times in 2007 and has finishes of second, third and ninth this year. “There’s so many good young players. They just stay in there. … You just got to keep knocking on that door. Hopefully it will open.”

Jeong Jang (69), who won in Rochester in 2006, tied for third at 12 under with fellow South Korean Hee-Won Han (69).

Cristie Kerr (69), preparing for her title defense in the U.S. Women’s Open, finished fifth at 11 under, two ahead of top-ranked Lorena Ochoa (69), Christina Kim (68), Japan’s Ai Miyazato (72) and South Korean Inbee Park (74).