orologio en CB01 OFFICIAL. K-1 World Grand Prix 2007 Final was a martial arts event held by the K-1 on Saturday December 8, 2007 at the Yokohama Arena in Yokohama, Japan. It was the 15th K-1 World GP Final, the culmination of a year full of regional elimination tournaments. All fights followed K-1's classic tournament format and were conducted under K-1 Rules, three rounds of three minutes each, with a possible tiebreaker.