"What I did in the 12th, that was unbelievable," Froch said. "I showed a little composure. I got up and knocked him out in round 12. What more do you want?
"Coming into the last round, I was hoping my intuition was right and Jermain was tiring from dealing with my pressure.
"I came out here to make a statement on American soil and I believe I made it."
Fight fans can watch the action 'as live' on ITV4 at 8:30pm on Sunday with highlights on ITV1 at 11:15pm.