the process of kalou's naturalisation became the theme of a short-lived television advertisement for centraal beheer. in the april 2006 advert, kalou is depicted as becoming a naturalised citizen, not of the netherlands, but of their archrival germany, playing alongside oliver kahn and former chelsea teammate michael ballack. this was a reference to angolan-born forward nando rafael, who, after failing to acquire dutch citizenship while at ajax, moved to hertha bsc, became a german citizen and represented germany at under-21 level before later playing for angola at the 2012 africa cup of nations.