New Zealand's world champion double sculls combination of Zoe Stevenson and Eve Macfarlane have suffered a setback in their final major competition ahead of the Rio Games.
They struggled with the pace in their heat finishing sixth at the latest World Cup event in Poland and will now have to go through the repechage in an effort to qualify for the A final.
The double World Champions lightweight women's double sculls duo of Sophie Mackenzie and Julia Edward caught a crab in their race coming to a complete standstill when they were out in front.
Mackenzie and Edward finished sixth and will have to go to a repechage to qualify for the final.
The unbeaten duo of Hamish Bond and Eric Murray proved dominant yet again in the men's pair heat.
The 2014 World Champion Emma Twigg won her single sculls heat convincingly by over nine second while
Olympic champion Mahe Drysdale won his men's single scull heat and also his quarter-final and will now contest the semis.
Drysdale's main rival, reigning World Champion Ondrej Synek of the Czech Republic has withdrawn from the event.
World Champion and world best time holder Zoe McBride snatched the lead in the lightweight women's single sculls by the 500m mark and never relinquished it.