If Llanelli lose at Hughenden on Friday and Bourgoin defeat Sale in France, then the French would squeeze through having come out on top in the aggregate scoreline with the Welsh side by a single point.
Former French Test player Saint-André said: "We know how strong Glasgow are at their home ground and we hope they are striving for the win. We know they are now out of the tournament but we trust they will still give their all."
Glasgow meet Llanelli at Hughenden on Friday January 17 (ko 7.30pm).