Answer
The answer to the question "From which club did Rafael and his twin brother begin their careers?" is Fluminense. Rafael and his twin brother, Fabio, are both Brazilian professional footballers who play as right backs. They both began their careers with Fluminense, where they played together from 2006 to 2009. Rafael then moved to Chelsea in 2009, while Fabio remained at Fluminense until 2012.