Diaz, who defeated a Katsuya Inoue at DREAM 3 in May, has not been paid for the fight.
"Nick's contract stated that [DREAM] had up to 30 days to remit payment," Cesar Gracie told MMAFighting.com. "They have not contacted us since the fight."
According to GracieFighter.com, Diaz, an EliteXC-signed fighter, would be allowed to fight Sakurai if a rematch with KJ Noons doesn't work out for the Oct. 4 EliteXC-CBS event in Fort Lauderdale, Florida. That is, if Diaz is compensated for the DREAM 3 fight.