Karyakin had entered Saturday 's final 64km stage with a lead of more than an hour over Casale as he won three of the four preceding stages .
Karyakin took a career - best fourth place in his third Dakar participation last year .
Karyakin , who took a career - best fourth place in his third Dakar participation last year , had entered Saturday 's final 64km stage with a lead of more than an hour over Casale as he won three of the four preceding stages .