Mendes was taken to the hospital for evaluation.
Earlier this week, Mendes noted on her Twitter account that she was in Vegas to prepare for next week's international tour: "Back to Las Vegas for some mega #DivaDuty before my trip to Brazil. Prepping for my match with @RealKellyKelly!!! Watch out Pretty Girl!!!"
UPDATE: WWE reports that Rosa Mendes has been released from the hospital late last night. She suffered serious whiplash, but no other major injuries were reported.