The Selecao boss revealed on Tuesday that he is 95% certain of the squad he will select for this summer's World Cup, but handed a surprise call-up to the Bayern right-back for Wednesday's game.
Rafinha played the full 90 minutes as goals from Oscar, Fernandinho and a Neymar treble sealed a comfortable victory, with Scolari pleased with his players.
"He was very good today and been good in what I’ve seen from him at Bayern. He has integrated well into the squad," he told reporters.
“The scoreline doesn’t tell the whole story of the game. South Africa played very well, they moved the ball well and played very well. It’s a surprise they are not at the World Cup, looking at the way they played.
“The difference between the two teams is that we have some very special players who can win games.”
Brazil will face African opposition at the World Cup having been drawn alongside Cameroon in Group A.