"Nikki Bella gave me an open hand slap and I was seeing stars," Rousey said. "I had a headache for the rest of the day." Ronda Rousey explained why she hid her symptoms, sharing that she didn’t ...

The image that I can’t forget—the one that truly pulls me into the savage, surreal, and ridiculously compelling world of professional slap fighting—is the open hand of heavyweight champion ...