Ramba uchiverenga ndima iyi - Achipinda mumwaka wake wokupedzisira, Grandjean akakwikwidza mumutambo unonzi sprint freestyle kaviri pamitambo yeOlympic yeZhizha ya2008 muBeijing. Akawana FINA A-standard yekupinda nguva ye49.09 (100 m freestyle) mushure mekupedza wechitanhatu kubva kuEuropean Championships muEindhoven, Netherlands. Mumakwikwi emamita 100 akasununguka
, Grandjean akaiswa pachinzvimbo chegumi nemapfumbamwe pama prelims emangwanani. Achishambira mumakwikwi manomwe, akapwanya rekodhi idzva reBelgian re48.82 mune chipfeko cheSpeedo, asi akarasikirwa zvishoma nehafu yekupedzisira nekudonha kwe0.27 yechipiri chete. Mazuva maviri gare gare, mumakwikwi emamita makumi mashanu akasununguka, Grandjean akahwina chinzvimbo chechina uye rekodhi yeBelgium yemaminitsi makumi maviri nemaviri nemakumi mana nemashanu mumakwikwi mapfumbamwe, achipfuura Matti Rajakylä wekuFinland nechikamu chidiki chechipiri. Grandjean akakundikana kuenda kumasemifinal, sezvo akaisa makumi maviri nemasere kubva pavanhu 97 vaishambira mumasekondi ekutanga.