Ketlen Vieira stuns UFC contender Sara McMann with second-round submission

Vieira is 9-0, winning her last three UFC fights. 

Ketlen Vieira just stunned the UFC world.

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In her third UFC fight, the bantamweight remained unbeaten by submitting contender Sara McMann early in the second round:

Vieira was in trouble in the first round, as McMann earned mount and pummeled on her opposition. Vieira was able to escape and nearly had a heel hook to end the round.

It's a stunning upset of McMann, who hoped to make her case for earning another title shot.

She had won her last three consecutive bouts heading into Saturday night. Vieira is 9-0, winning her last three UFC fights.