Liam O'Brien and Alyssa Lock for the win.
The Gold Coast Duo take out the inaugural Cape Naturaliste Pro.
Cape Naturaliste Pro has only eight men and four women remaining in contention for inaugural event title.
competitors faced touh conditions at Yallingup Main Break on Day 1
Victory at sea conditions suit the local contingent on the opening day at Yallingup Main Break.
The Western Australian Pro Surf Series heads to Yallingup for the final stop which runs from October 18 - 21.
The West Australian Pro Surf Series will see the Mandurah and Cape Naturaliste Pro's Men's and Women's QS1,000's This October.