Saints trio doubtful for Buddies
Stuart McCaffrey (groin), Danny Grainger (thigh) and Steven Anderson (virus) have failed to train so far this week.
McInnes’ threadbare squad has been further hit after it was revealed striker Collin Samuel will be out for six weeks after undergoing exploratory knee surgery in London.
Saints (from): Smith, Grainger, MacKay, Anderson, McCaffrey, Gartland, Irvine, Morris, Morais, Swankie, Davidson, Millar, Moon, Johansson, Deuchar, Main, Craig, May, Durnan.