Hong Kong swimming star Siobhan Haughey won the 100 metre freestyle in a meet record 52.94 seconds to claim her third title at the US Open swimming championships on Saturday as Katie Ledecky closed the meeting with a dominant 1,500 metre free win.

Haughey, the 100 metre free silver medallist at the Tokyo Olympics and at the World Championships this year, powered to the win over Americans Torri Huske and Abbey Weitzeil, Huske finishing in 53.17 and Weitzeil in 53.53.

The victory at the meet in Greensboro, North Carolina, followed Haughey's two triumphs on Friday, when she beat Ledecky in the 200m free and returned less than half an hour later to upset Tokyo Olympic gold medallist Lydia Jacoby in the 100 metre breaststroke.

Ledecky, who had also settled for second in the 400 metre free behind Canadian teenager Summer McIntosh, closed with a characteristically dominant 1,500 metre win in 15 minutes 46.38 seconds.

The seven-time Olympic champion, who eased to victory in the 800m free on Wednesday, was almost 25 seconds faster than runner-up Paige Madden.

Matt King won the men's 100 metre freestyle, with Ryan Held second.

Caeleb Dressel, whose five Olympic gold medals in Tokyo in 2021 included the 100 metre free, was second behind Josh Liendo in the "B" final as he continues a comeback aimed at next year's Paris Olympics. (AFP)