The men's field is even deeper, with Biazizzo taking out the ICF World Cup series title in Slovenia and Delfour - who was born in French Polynesia but has competed for Australia since 2010 - finishing second in 2015.
Czech star and Whitewater XL champion Ondřej Tunka, sixth in the ICF World Cup series last year, has stayed in New Zealand training and will also line up, joining top United States paddler and Rio Olympian Michal Smolen.
Switzerland's Martin Dougoud, France's Pierre Bourliaud and Jaxon Merritt complete a classy top-10, alongside Dawson and rising Kiwis Callum Gilbert and Finn Butcher.
Gilbert goes into the New Zealand Open as defending champion, having beaten Dawson for the first time at the same event 12 months ago.
This weekend's racing starts at 9am on Saturday, with semifinals and finals on Sunday.