SAN FRANCISCO — The calculus homework awaiting Megha Ganne might have to wait a couple more days to get done. The 17-year-old amateur has more pressing business this weekend at the U.S. Women’s Open.

Ganne followed up a strong opening round by shooting an even-par 71 in the second round at the Olympic Club on Friday and heads into the weekend two shots off the pace set by fellow teenager Yuka Saso.

The high school junior from Holmdel, N.J., held the lead after the morning rounds, only to watch the 19-year-old Saso from the Philippines pass her with birdies on two of the last four holes. Ganne hopes that will buy her some extra time on that calculus homework, and a shoutout on Twitter from New Jersey governor Phil Murphy could help her cause.

“I don’t know how I’m going to manage to fit that into my schedule in the next few days,” she said. “Hopefully, my teacher gives me a little bit more time to do that. It’s hard to balance both.”

Jeongeun Lee6, the 2019 champion from South Korea, birdied three of her final four holes to shoot 67 and finish one shot behind Saso at the Lake Course. American Megan Khang birdied the par-5 17th to get into a tie for third with Ganne at 4 under.

Ganne, who needed a playoff just to qualify for her second U.S. Women’s Open, got off to a bit of a slow start with her early morning tee time that brought San Francisco fog that made the course play even longer than usual. She started on the ninth hole and bogeyed Nos. 12 and 15 before getting on track with a nearly 20-foot birdie on the par-5 16th.

After a second bogey at 18, she closed strong by making a long birdie on No. 1 and then another birdie on the par-4 seventh hole that she punctuated with a fist pump. She then spent her time waiting to hit her tee shot on her final hole repeatedly bouncing a ball on her club, showing few signs of nerves in front of a crowd much bigger than her usual ones as an amateur.

“That was the biggest gallery we’ve seen and she was unfazed by it,” said her father, Hari Ganne.

Ganne’s mother, Sudha, said her daughter has always enjoyed being on center stage ever since playing the role of the Queen of Hearts in an “Alice in Wonderland” play as a young child.

“I love it so much,” Megha Ganne said. “I wish every event I had a gallery watching me because it just makes me play better, I think. And I love being in the spotlight, so it’s been really fun.”

Ganne’s tee shot on her final hole went past the green but she managed to save par with a tricky 10-foot putt.

“It was a challenging putt,” she said. “I just wanted to get it started on line. On the hole before that I made a birdie, so I wasn’t too worried if I made a bogey on the last one, but I’m glad it fell.”