Dee ihe na-aga n'ihu maka paragraf a - N'ịbanye n'oge egwuregwu ya, Grandjean gbara asọmpi na ịgba ọsọ ọsọ abụọ n'egwuregwu Olimpik nke 2008 na Beijing. O nwetara oge ntinye FINA A nke 49.09 (100 m freestyle) mgbe ọ gwụchara nke isii site na European Championship na Eindhoven, Netherlands. Na 100 m freestyle
, Grandjean gbara onye nke iri na itoolu n'asọmpi ụtụtụ. Na-egwu mmiri na okpomọkụ asaa, ọ gbawara ihe ndekọ ọhụrụ nke Belgium nke 48.82 na Speedo techsuit, mana ọ fọrọ nke nta ka ọ bụrụ na ọ bụ naanị 0.27 nke abụọ. Ụbọchị abụọ ka nke ahụ gasịrị, na 50 m freestyle, Grandjean gbara ọsọ dị ịtụnanya site n'ịnọ n'ọnọdụ nke anọ na ihe ndekọ Belgium nke 22.45 na okpomọkụ nke itoolu, na-agafe Matti Rajakylä nke Finland site na obere akụkụ nke abụọ. Grandjean enweghị ike ịga n'ihu na ọkara ikpeazu, ebe ọ bụ na ọ nọrọ na nke iri abụọ na asatọ n'ime ndị na-egwu mmiri 97 na prelims.