The world's top four female surfers including Australians Tyler Wright and Sally Fitzgibbons progressed to the quarter-finals of the Rio Pro in Brazil on Friday.
Ratings frontrunners Carissa Moore, Wright, Courtney Conlogue and defending champion Fitzgibbons all advanced with decisive heat wins as the title race heated up at Barra da Tijuca.
The women's event completed a massive four rounds of the competition in clean two-to-four foot waves.
Hawaii's Moore, the ratings leader, defeated local Silvana Lima, New Zealander Paige Hareb and fellow Hawaiian Alessa Quizon on her way to the final eight.
Moore has won two of the four events this year and is again looking in deadly form and will take on Australia's Laura Enever in the quarters.
Breathing down her neck is world No.2 Wright who reached the quarter-finals in Rio for the first time.
Wright scored the two highest heat totals of the day, winning her round-one encounter with a total of 17.04 points (out of a possible 20) and later eliminating Hawaiian Coco Ho with a heat total of 17.00 points in round four.
Wright takes on Hawaii's Malia Manuel in the quarter-finals while Fitzgibbons meets American Lakey Peterson.
While US Conlogue faces South Africa's Bianca Buitendag in the other quarter.