Neiufi led from just about start to finish, emerging from the water in second and quickly taking the lead. She touched at halfway with a 0.81-second advantage before racing away to the wall to win by 1.47 seconds and take gold.
Neiufi finished in a time of 1:16.84, well ahead of second-placed Ukrainian Kateryna Denysenko, who touched in 1:18.31.