The 28-year-old has had a good start to the season under Pep Guardiola, with Philipp Lahm's shift to midfield granting him the chance to impress in a right-back role.
And Rafinha is hopeful his performances will catch the eye of Selecao head coach Luiz Felipe Scolari.
"I am doing fine and I am still hoping to play more regularly," he told Bild.
"Who knows, maybe I can be back in the Brazil fold for the 2014 World Cup.
"Dani Alves of Barcelona is the starter, but no-one knows who will be his backup next summer. If I keep up with my form and play matches, there could be a chance I can make it."
Guardiola himself admits he has been pleasantly surprised at the level of the former Schalke defender's performances in 2013-14.
"Rafinha is a superb player. I am surprised about his performances," he told Kicker.
"He has played great in these last matches as well as doing fine in training also."