Falkirk's highly-rated youngster Mark Kerr has been handed a late call-up to the Scotland under-21 squad to face Poland on Tuesday.

Kerr was drafted in by stand-in boss Bobby Williamson after Craig Brown brought Kenny Miller into the senior squad to compensate for withdrawals.

Newcastle defender Stephen Caldwell has been pencilled in as a senior squad replacement for Hearts defender Steven Pressley, who is doubtful with a calf problem.

Brown said: "I think he (Caldwell) is a future Scotland player and that would give us the 18 players that we require."

Williamson, the Kilmarnock manager, is in charge for the first time because under-21 coach Alex Smith has club commitments.

The match kicks off at 1600BST in the Mosir Stadium in the town of Wloclawek.