Barbara Seixas and Fernanda Alves had earned gold and silver at the 2015 edition of the Championships with different partners, but the duo were unable to reach the last 16 together at the Red Bull Beach Arena on Danube Island.

They were impressively beaten 21-16, 21-10 by Canada’s Melissa Humana-Paredes and Sarah Pavan, the tournament seventh seeds.

Humana-Paredes and Pavan will now face Tanja Hüberli and Nina Betschart of Switzerland.

“I am disappointed of course because we prepared hard and couldn’t do better,” said Barbara.

“We are a new team and we are focusing on difficult moments because that is how you learn.

“We have a long way to go.”

There was better news for Brazil’s Talita Antunes and Larissa Franca, as the top seeds swept into the last 16.

They beat lucky losers Ana Gallay and Marie Zonta of Argentina 21-12, 21-14 to set up a clash with Anouk Vergé-Dépré and Joana Heidrich of Switzerland.

There was a surprise in the men’s competition as Nivaldo Diaz and Sergio Gonzalez of Cuba came from behind to win 17-21, 21-15, 15-10 against top seeds Saymon Barbosa and Alvaro Filho of Brazil.

The victory saw the Cuba’s finish top of Pool A with three straight wins, granting them top seeded status in the last 32.

Diaz and Gonzalez will meet a lucky loser as they bid for a place in the final 16 tomorrow.

Tournament second seeds Janis Smedins and Aleksandrs Samoilovs of Latvia were forced to settle for the runner-up spot in Pool B.

It followed their 21-17, 21-19 loss of Qatar’s Jefferson Santos Pereira and Cherif Younousse, who eventually topped the standings.