Rotorua's Kane Radford and Taranaki's Charlotte Webby will look to qualify for the Rio Olympics in the next few days.
The pair lead the New Zealand campaign at the Fina World Swimming Championships in Russia starting this weekend.
The pair will compete in the all-important 10km Open Water World Championship, which is also the first of two qualifying events for the 2016 Rio Olympics.
The championships begin with the 5km Open Water event at the weekend but the two Kiwis have their sights firmly fixed on the 10km swim on Monday for the men and Tuesday for the women, in Kazan, Tatarstan.
The top 10 swimmers in both races will qualify for Rio with a further nine places to be decided at a second event in Portugal next year.