He amassed Primeira Liga totals of 213 games and 34 goals over the course of nine seasons, notably representing in the competition Sporting (three years), Boavista and União de Leiria (two apiece).
[2] He started his professional career at AS Saint-Étienne but did not make any Ligue 2 appearances for the French club, moving to Portugal when he was 20 and signing with Boavista FC.
[4] Never an undisputed starter, however, he would be loaned for 2006–07 to England's Portsmouth on the very last day of the summer transfer window, with a view to a permanent signing.
[5] Speculation during the 2007 winter window had linked Douala with a move away from the club, with the player reportedly frustrated at his lack of first team opportunities at Fratton Park.
On 15 March 2010, 31-year-old Douala moved teams and countries again, signing with Belgium's Lierse SK,[12] and the club returned to the Pro League at the season's end, with the player contributing with one goal.