David winning at the 2017 Grappling Industries in Melbourne

Marcel Leteri Sasso de Oliveira's student at the 2017 Grappling Industries in Melbourne.

David D’Aversa winning at the 2017 Grappling Industries in Melbourne.

Success for Marcel Leteri Sasso de Oliveira’s student, Gold Medals for David D’Aversa in his division at the 2017 Grappling Industries in Melbourne.