On September 28 in Nagoya, Japan, the main event of Rizin 51 featured a lightweight title fight between Brazilian Roberto de Souza and Japanese Yoshinori Horie.
De Souza won by submission choke in the first round, successfully defending his championship belt.
De Souza’s previous fight was in May 2025 at Rizin FF - World Series in Korea, where he also secured a first-round submission victory over Won Bin Ki. His record stands at 20 wins and 3 losses.
Horie last fought in June 2025 at Rizin FF Landmark, winning by first-round TKO against Yamato Nishikawa. He holds 14 wins and 6 losses.
