After four days of peeling left-hand waves and fierce competition from the world's best SUP surfers, Australia's Shakira Westdorp and Brazil's Luiz Diniz both repeated as SUP Surfing World Champions at the 2018 ISA World SUP and Paddleboard Championship at Riyue Bay on China’s Hainan Island.

Make it three in a row for Shakira Westdorp. Photo courtesy of ISA

Westdorp was able to fend off a valiant effort from Spain's Iballa Ruano Moreno, who would earn the Silver medal, while New Zealand's Stella Smith took the bronze. For Australia’s team captain, the victory marked her third consecutive Women’s SUP Surfing Gold medal at the ISA Worlds.

"I am so stoked to win," said Westdorp. "I had to go the long way through the Repechage, but it paid off in the end.”

The Men’s Final was decided in thrilling fashion. In the closing seconds of the heat, Diniz was able to secure a huge 9.5 score to leapfrog Australia's Harry Maskell and take the Gold medal.

Luis Diniz is the Men’s SUP Surfing back-to-back world champ. Photo courtesy of ISA

"I am so happy to win the Gold Medal two times," said Diniz. "I want to thank my family and friends for making this possible."

The lower steps of the Men’s podium were occupied by Maskell in second and Brazil's Caio Vaz in third.

Sweet victory. Photo courtesy of ISA

The ISA World Championships will continue this week with the Technical Races beginning on Monday. Stay tuned to SUP Magazine’s Facebook page for live streams and highlights from the big week of competition.

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ISA moves 2018 World SUP and Paddleboard Championships from Brazil to China.

Get to know Luiz Diniz.