Michael winning at the 2017 Grappling Industries in Melbourne

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

Michael Rybak winning at the 2017 Grappling Industries in Melbourne.

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