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The betting site Ladbrokes has Oracle's odds at 1-to-3 and New Zealand's at 9-to-4.
It's a huge turnaround. New Zealand was up 8-1 and only needed to win one more race to win the cup last week. But Oracle came storming back, winning seven-straight races to force a winner-take-all finale today.
It starts at 4 p.m. on NBC Sports Network.
The current odds: