Kammala wannan jumla: Stravius ya bayyana a fagen duniya a
Gasar tseren tseren Turai ta 2009 a Istanbul inda ya kasance wani bangare na lashe tseren tseren tseren tseren mita 4 × 50 kuma ya gama a cikin manyan 8 a tseren mita 50 na nono. A shekara mai zuwa a gasar tsere ta Turai ta 2010 a Hungary, Stravius ya lashe lambar yabo ta farko a taron kasa da kasa, inda ya lashe azurfa a tseren mita 100 a baya. A wannan gamuwa, ya kuma kasance wani ɓangare na lashe 4 × 100 m medley relay da tagulla lambar yabo lashe tawagar na 4 × 200 m freestyle relay. Stravius ya lashe lambar zinare ta farko ta kasa da kasa ta lashe lambar zinare a tseren mita 100 a gasar cin kofin duniya ta FINA ta 2011 a Shanghai. Ya raba shi da ɗan ƙasar Camille Lacourt. Ya kuma sami lambar azurfa a tseren tsere na 4 × 100 m da tseren tsere na 4 × 200 m a wannan gamuwa.