The duo had picked up the FIVB Beach Tour crown in Warsaw, Poland just two weeks ago and they maintained their form with a comeback victory to open their Pool I account.

Losing the first set to Australians Cole Durant and Damien Schumann 19-21, the Brazilians fought back for a 19-21, 21-15, 18-16 triumph.

In Pool C, Austrian pair Clemens Doppler and Alexander Horst followed up yesterday's victory with a 21-12, 21-17 win against Yusuke Ishijima and Yuyu Ageba of Japan.

Russians Viacheslav Krasilnikov and Oleg Stoyanovskiy enjoyed a 21-16, 21-18 triumph against Italian pair Alex Ranghieri and Marco Caminati for their second successive group win.

The opening Pool G games saw Polish pair Piotr Kantor and Bartosz Łosiak, and Americans Jacob Gibb and Taylor Crabb, open their accounts with comfortable straight sets victories.

In the women's draw, the fourth-ranked Canadian pair Heather Banslie and Brandie Wilkerson started their campaign with a crushing 21-8, 21-7 victory against Maria Florencia Rotti Giordano and Camila Bausero of Uruguay.

Fellow Canadians Sarah Pavan and Melissa Humana-Paredes also defeated South American opposition as they made a winning start in Pool I.

Yuli Ayala and Diana Rios of Colombia could not contend with the Canadians, who eased to a 21-6, 21-13 win.

New world number ones Ágatha Bednarczuk and Eduarda "Duda" Santos Lisboa of Brazil secured a second successive victory when they got the better of Cubans Mailen Deliz Tamayo and Leila Consuelo Martinez Ortega 21-15, 21-12 in Pool F.

Quarter and semi-final matches will be staged on July 6, with medal matches held the following day.