Ayr United v Celtic
Hampden Park, Glasgow,
kick-off 5.35 pm Live on Sky Sports
Referee: Stuart Dougal
If drawn or postponed, the match will be replayed on Tuesday, 2 April, kick-off 7.45 pm.
Sunday, 24 March Rangers v Partick Thistle
Hampden Park, Glasgow,
kick-off 3.00 pm Match highlights on BBC Scotland
Referee: Michael McCurry
If drawn or postponed, the match will be replayed on Wednesday, 3 April, kick-off 7.45 pm.
Tickets for both matches are available only through the competing clubs.