Celtic won the League Cup for the 15th time in their history when they defeated Dundee United 2-0 at Hampden in March 2015.
It was one of seven meetings between the teams that season and four of them, including this one, came within a space of a fortnight.
Kris Commons opened the scoring just before the half-hour mark and United had skipper Sean Dillon sent off for a high tackle on Emilio Izaguirre early in the second half.
Substitute James Forrest made the game safe when he steered the ball home from the edge of the box with 11 minutes left but he later had a penalty saved by Radoslaw Cierzniak.
How they lined up
26 Craig Gordon
3 Emilio Izaguirre
4 Efe Ambrose
5 Virgil van Dijk
6 Nir Bitton (Liam Henderson 82)
8 Scott Brown
10 Anthony Stokes
15 Kris Commons (James Forrest 69)
22 Jason Denayer
25 Stefan Johansen
28 Leigh Griffiths (John Guidetti 69)
Subs (not used): Lukasz Zaluska (GK), Stefan Scepovic, Darnell Fisher, Callum McGregor