Rubuta ci gaba don wannan sakin layi - A farkon kakar wasan sa na farko ya sami lambar tagulla a gasar cin kofin duniya ta Heidenheim ta 2011 da lambar azurfa a gasar cin kofin duniya ta Vancouver ta 2015. Wadannan sakamakon sun sa aka zaba shi don gasar zakarun Turai ta 2011
a cikin Sheffield. A wasan mutum Gustin ya doke Géza Imre na Hungary da Benjamin Steffen na Switzerland, amma ya fadi ga Max Heinzer, shi ma daga Switzerland, a teburin 16. A wasan kungiya, Faransa ta ci nasara a kan Switzerland, Ukraine da Hungary don lashe lambar zinare.