It will be in K-1 in Japan. By the way, Matt Serra (Renzo Black Belt) was also beaten by BJ Penn. Easy to bills as a teacher seeking revenge for his students. I like Renzo. He's a great guy (and promoted me to Blue Belt), but BJ is tough. Renzo lost to Carlos Newton in his last MMA fight. Unless he's improved his stand-up, I don't see him beating BJ. I'll go with BJ by decision.