Celtic v Rangers is a fixture steeped in history.
And, in February, the history books will have to be updated, with both rivals meeting once again in the last four of the Scottish League Cup.
Celtic fans have been given an early glimpse of what it might feel like to enjoy the bragging rights, however, after their developmental side beat Rangers' developmental side 6-1 last night.
The Bhoys' youth team were 1-0 down and ended up victorious against 10-man Rangers - as the away team - and two of their heroes took to Twitter to react after the win.
Unbelievable 6-1 victory at murraypark! Bhoys were class— Kieran Tierney (@kierantierney1) December 2, 2014
What a result beating Rangers 6-1 away! Absolutely buzzing!!— Joe Thomson (@joethomson1997) December 2, 2014
Kieran Tierney gave his side the lead in the first half just moments after Celtic had initially equalised.
Joe Thomson, meanwhile, also played his part in what will no doubt be one of the most memorable victories of these youth players' lives - if not the most memorable.
Rangers supporters will hope their senior side can produce a very different outcome in February...