After four years competing in the major single-seater categories in Europe (2001–2005), and having proved himself driving for the low budget team Interwetten.com in World Series by Renault during its 2005 season, Rees was awarded a test in the renowned Italian dream Draco Racing in the winter of that same year. With more than 30 drivers on track, including 2005 season champion Robert Kubica, Rees lead the field in the demanding track of Valencia, with more than half a second gap to Pastor Maldonado, who emerged second. The test opened new doors for the Brazilian driver, and 2006 was a promising year.