The sisters, Iballa Ruano Moreno and Daida, have added a touch of sporting glamour to the competitive world of windsurfing with their freestyle displays.

卢娜诺和黛达姐妹的自由式表演为竞技性的风帆冲浪运动带来了一种运动魅力。

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Els Callens and Virginia Ruano Pascal then played out a three hour and 35 minute marathon before Callens came through 2-6 6-4 11-9.

BBC: Chanda Rubin in action

In other action, Shenay Perry, a 19-year-old American, beat Virginia Ruano-Pasqual of Spain 6-4 6-3, while Tathiana Garbin of Italy upset sixth-seeded American Laura Granville 7-6 6-1.

BBC: SPORT | Tennis | Pratt eases through