Originally scheduled to meet Matt Hughes in a grappling contest, Gracie will now take on Sanae Kikuta, the promotion announced Thursday. ADCC 2017 takes place at The Espoo Metro Areena on Sept. 22-24.
Hughes suffered a horrific accident on June 16, when his truck was hit by a train, and is still hospitalized.
Gracie and Kikuta met once under mixed martial arts rules in the past with the Brazilian winning with a guillotine choke 43 seconds into the sixth round at PRIDE 2 in 1998.
Kikuta is one of the few non-Brazilians to ever win an ADCC gold medal, in 2001.