"I'm coming into the medal race full of adrenaline. I love adrenaline."
Finland's Petaja drew into contention in the lighter breeze and won the final race to move into bronze medal position. The Fin said, "Today was excellent. The lighter winds are not normally my speciality so I am particularly happy."
Petaja has been consistent all week long with a discarded eighth her worst result and showed she can mix it up, "I'm really confident with my speed in heavy winds, and today I proved I can do it in the light winds," she added.
Germany's Moana Delle is third, one point behind the Israeli and Fin whilst Zofia Klepacka is fifth on 41 points.
The Women's RS:X will contend their Medal Race at 14:00 local time on 7 August.
1. Marina Alabau (ESP) - 24pts
2. Lee Korzits (ISR) - 38pts
3. Tuuli Petaja (FIN) - 38pts
4. Moana Delle (GER) - 39pts
5. Zofia Klepacka (POL) - 41pts
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