Nelly Korda, Kim Sei-young and Madelene Sagstrom hold a share of the lead after the first round of the Women's Open.
World number one Korda has already won the Women's PGA Championship and an Olympic gold medal this year and the American set her sights on Open glory following her triumph in Tokyo.
The American made a great start at Carnoustie on Thursday, carding a five-under 67 to sit alongside Kim and Sagstrom at the top of the leaderboard.
Korda went out in 33 courtesy of four birdies and made another four gains in her final six holes, dropping shots at the 12th and 16th.
Kim dropped just one shot at the 15, having made six birdies in the space of nine holes either side of the turn.
Sagstrom would be out on her own at six under but for a dropped shot at 18 in a round she started with four gains in her opening six holes,
Scot Louise Duncan, winner of the Women's Amateur Championship in June, got under way with an impressive four-under 68 on home soil, while Georgia Hall, Yuka Saso and Andrea Lee are also just one shot off the lead.
Lexi Thompson is well poised on three under along with Carlota Ciganda and Lizette Salas, with Hinako Shibuno and Inbee Park among the players a further stroke back.