Nelly Korda’s rollercoaster season at the Majors took further turns in the third round of the AIG Women’s Open.

The world number one began Saturday on the Old Course at St. Andrews with a three-shot lead, bogeying her first two holes. She recovered with birdies on holes 3, 5 and 9 to regain a three-shot lead on the back nine.

The second half was a struggle, however. Korda dropped her shots on the 12th and 13th holes and then hit her tee shot out of bounds on the par-4 16th. Korda made double bogey there, falling two shots behind the new sole leader Jiyai Shin.

Korda also bogeyed the 17th hole to fall three shots behind the leader, but she made a birdie on the par-4 18th to finish with a troubling 3-over 75. At 5 under par for the championship, Korda sits alone in third place, two shots behind Shin (67) and one behind Lilia Vu (71).

“Yes, of course you want to finish well with the double on 16 and the bogey on 17,” Korda said in a brief television interview. “I was happy that I managed that. Hopefully I can carry that momentum into tomorrow.”

Korda won the first major of the LPGA season, the Chevron Championship, her fifth consecutive victory on tour.

Her early season dominance waned at the U.S. Women’s Open, where she shot a 10 on her second hole of the event and missed the cut.

After an opening score of 69 at the next major, the KPMG Women’s PGA Championship, Korda shot a surprising 81 (one more than the 80 she scored at Lancaster Country Club) and once again had the weekend off.

She finished 26th at the Amundi Evian Championship and had a chance of a medal at the Paris Olympics, but played poorly in the final stretch and fell back to 26th place again.

Nevertheless, she has a good chance of securing one of the most important titles, because there are still 18 holes to play this Sunday in St. Andrews, which is expected to be very strenuous.

“I think it’s going to be a tough day. I think it’s going to be windy. It could rain too. I’m going to stay positive. Take it one shot at a time,” she said. “I played really well the first two days, so I’m going to take that momentum into tomorrow.”