BT Sport will have live coverage of the matches at Easter Road and McDiarmid Park.
Tuesday September 25
Hibernian v Aberdeen
Live on BT Sport, kick-off 7.45pm
Wednesday September 26
Heart of Midlothian v Motherwell
Kick-off 7.45pm
Wednesday September 26
Rangers v Ayr United
Kick-off 7.45pm
Wednesday September 26
St Johnstone v Celtic
Live on BT Sport, kick-off 7.45pm
In the event of a draw after normal time, extra time of 30 minutes (i.e. 15 minutes each way) will take place and thereafter, if necessary, kicks from the penalty mark
Dates for future rounds
Semi-finals: Weekend of October 27/28
Final: Sunday December 2
