He featured regularly for the Chelsea reserve and youth teams in both the 2005 -- 06 and 2006 -- 07 seasons .
Elmer was signed by English Premier League side Chelsea in the summer of 2005 from Grasshoppers .
Elmer featured regularly for the side reserve and youth teams in both the 2005 -- 06 and 2006 -- 07 seasons .
Elmer was signed by English Premier League side Chelsea in the summer of 2005 from Grasshoppers .