1 RIZIN.6 RIZIN FIGHTING WORLD GRAND-PRIX 2017 1st ROUND -夏の陣- Jul 30, 2017 RIZIN.6 RIZIN FIGHTING WORLD GRAND-PRIX 2017 1st ROUND -夏の陣- 2017 360 min 1 vues Rizin World Grand Prix 2017 Opening Round Part 1 was a mixed martial arts event held by the Rizin Fighting Federation on July 30, 2017 at the Saitama Super Arena in Saitama, Japan.