Britain's Keri-Anne Payne won gold at the final 10km Marathon World Cup event of the series in Hong Kong.
Payne beat a field including the winner of the last round, Brazil's Ana Marcela Cunha, while Briton Jack Burnell, 22, finished fourth in the men's event.
South-African born Payne, 27, said shw will now take a short break before her focus switches to qualifying for the Rio 2016 Olympic Games.
"That was a great result for me," said Beijing Olympic silver medallist Payne.
"This is the last race of the season and I swam through the summer to make sure it was a good one.
"It's always a fight to the finish, but it's nice to come out with the win."