Dylan Tombides suffered FIFA U17 World Cup disappointment as Brazil scored a narrow 1-0 win over his Australia side on Thursday.
The Joeys looked set to grab a hard-earned point until Adryan stepped up and curled a free-kick into the top corner with just 14 minutes remaining.
Earlier, West Ham United striker Tombides had worked Brazil goalkeeper Charles with a left-foot shot as Australia threatened a big upset to follow their opening win over Ivory Coast.
The Group F defeat in the Mexican city of Guadalajara leaves Tombides and his team-mates facing a make-or-break final group-stage fixture against Denmark in Queretaro on Sunday.
With the Danes losing 4-2 to Ivory Coast in Thursday's other group game, the Ivorians and Australians both have three points from two matches, while Denmark have zero. Brazil have six points and are already through to the last-16, with only the group runners-up
Concentrating on Thursday's match and both Tombides and Jesse Makarounas - who both scored against Ivory Coast - came close to breaking the deadlock before half-time.
Brazil also passed up a number of chances before Adryan, who will join Manchester United at the age of 18, settled matters with an inch-perfect 25-yard free-kick.
Before Australia face Denmark on Sunday, West Ham team-mate Blair Turgott's England tackle Uruguay in Torreon on Saturday, knowing a draw would be enough to see them qualify for the knockout stages.