At the Rizin FF 1 post-fight press conference early Tuesday morning, Rizin FF boss Nobuyuki Sakakibara announced an eight-man, open-weight World Grand Prix tournament which will occur at their next two events in September and on New Year's Eve.

At the press conference, streamed live via Periscope, Sakakibara said this is only the beginning when it comes to "unique events that only [Rizin FF] can do."

Former UFC fighter Wanderlei Silva is the first confirmed fighter for the Grand Prix tournament.

Silva competed at this past weekend's Rizin FF 1 event in a tag-team grappling match with Kiyoshi Tamura against Kazushi Sakuraba and Hideo Tokoro. The match kicked off the main card and resulted in a draw. The Axe Murderer, an MMA legend, has not competed in MMA since a 2013 knockout over Brian Stann. He is currently suspended by the Nevada State Athletic Commission until spring 2017 for evading a drug test in 2014. He was initially suspended for life but his suspension was reduced to three years earlier this year.

"[Sakakibara] asked me what weight I wanted and I said open because I want to give every fighter a chance to beat me," Silva said (H/T @SecretMovesMMA). "Any fighter willing to fight me will get stomped in the face and kicked in the head."

Rizin FF's New Year's Eve event will take place from the Saitama Super Arena in Saitama, Japan -- the same location as their inaugural event.

The first four quarterfinal matchups (opening round) will occur at the September event, and the semifinals and finals will occur at the December event. No other fighters or fights have been booked for either card at this time.

Rizin FF has hosted three events since the beginning of its existence -- two last year, including a card topped by the return of Fedor Emelianenko and Bellator MMA fighter King Mo, and the card this past weekend headlined by last year's Grand Prix runner-up, Jiri Prochazka, fighting Kazuyuki Fujita.

Rizin FF 1 was not readily available to watch in North America. Sakakibara promises that the promotion is currently figuring out ways to allow fans across the world to watch its events live.