Lydia Ko has retained a remote chance of pushing for a third major golf title with a strong penultimate round at the US Open.
But a birdie blitz from Australian Minjee Lee has left her with just one close challenger, American Mina Harigae, going into the final round in North Carolina.
An impressive title bid by Swedish amateur Ingrid Lindblad and world No 2 Nelly Korda's outstanding comeback from a blood clot in her arm were the dominant stories of the tournament.
But both players faded as Lee became the big news with five birdies in seven holes midway through the third round.
The 26-year-old from Perth - who won her first major last year - finished the day at 13-under, three ahead of Harigae. Ko is in a group of players tied for fourth, seven shots behind the leader.