The visitors were forced into a late change on the bench after Alex MacDonald was injured in the warm-up, the forward replaced by under-19 player Blair Alston.

BBC: St Mirren's Billy Mehmet (left) gives chase to Pele

If he does, 41-year-old Jens Lehmann will drop to the substitutes bench - unless Manuel Almunia, who deputised for Szczesny until hurting a knee in the warm-up for the Blackpool game, is passed fit.

BBC: Wojciech Szczesny