West Coast Eagles veteran Andrew Embley suffered an injury setback at a closed training session on Friday morning which could sideline him for three to six weeks leading into the new AFL season.

The incident occurred during a match simulation drill at Patersons Stadium, with the 2006 Norm Smith medallist suffering a subluxation of the right shoulder that is likely to keep him out of the NAB Cup pre-season competition.

While the injury will be closely monitored in the coming days, it is anticipated Embley will be ready for the start of the season proper.