KOHLER, Wis. — Even as she climbed into the lead in the second round of the U.S. Women’s Open on Friday, Suzann Pettersen took some time to admire Michelle Wie’s big move into contention.

Pettersen, the Norwegian star ranked sixth in the world, shot a 4-under 68 at Blackwolf Run on Friday and moved to 5 under for the tournament. But Wie was even better on the day, carding a 6-under 66 to move to 4 under and put herself in position to break out of a season-long slump.

Wie was tied with Cristie Kerr, the 2007 Open winner, one stroke off the lead.

Pettersen was playing in the group directly behind Wie, giving her a pretty good view of what turned out to be an impressive display of accurate approach shots and made putts.

“She was fist-pumping, every putt she looked at,” Pettersen said.

Wie said she doesn’t spend much time thinking about the attention she received as a high-profile child prodigy in the early 2000s, or whether some fans had written her off since then.

“I don’t know if anyone gave up on me or not,” Wie said. “I’m sure some did and some didn’t. But I never gave up on myself, and today was a good reminder to myself that I can do (it) and I still have it.”

Kerr, who was tied for the first-round lead at 3 under with Lizette Salas and Brittany Lincicome, had a 71.

“I always draw on that experience, of course, but it’s hard to predict what’s an advantage and what’s not an advantage,” Kerr said of her previous Open win. “You just don’t know.”

Sandra Gal, Inbee Park and Vicky Hurst shot 70 to reach 3 under.