Substitute Luiz Adriano secured Internacional's place in the final of the Fifa Club World Championship.
Adriano came off the bench for Pato Alexandre
Adriano scored late in the second half to lead the Brazil side to a 2-1 win over Egypt's Al Ahly in the semi-finals in Tokyo.
His 72nd-minute near-post header from Ceara's corner proved the winner.
Fellow teenager Pato Alexandre had put Internacional ahead before Flavio equalized in the 54th minute for the African champions.
They will face the winner of Thursday's semi-final between European champions Barcelona and Mexico's Club America.