Monday's Team News
Smith came through a reserve match with Kilmarnock on Tuesday with no ill-effects, other than being on the end of a 1-0 defeat.
Meanwhile Scotland U21 defender Diamond should have shaken off the knock picked up against Kilmarnock in the SPL fixture two weeks ago.
Dyron Daal, Richie Byrne, Karim Touzani and Steve Lovell are still on the long-term injury list for the Dons.