Isaac Doederlein vs Cleber Sousa

Isaac Doederlein defeated Cleber Sousa by advantages, 1-0, at the 2025 IBJJF Brazilian National Championship. Both competitors received a penalty for a double pull early in the match. Cleber then pulled guard and completed a sweep for two points, followed by a stack pass attempt that kept Isaac pinned for a stretch.

Isaac worked to clear the stack position and returned to his open guard. Around the three-minute mark he found his angle, scooted around, and attempted to take the back. He moved to top position with one hook in as Cleber stood, and the referees awarded him two points. The position transitioned into a backpack carry, but Cleber shook him off and the match returned to closed guard.

With ninety seconds remaining, Isaac held a one-advantage lead and closed out the match. He is noted as the World Champion.