Another theory is that the term originated from match commentators describing an early meeting between the two teams meeting as "like two old, firm friends". Why do Celtic fans say there is no ...

Ibrox Stadium was filled with 51,000 home fans but no away supporters on Thursday -- the latest Old Firm derby to feature just one set of fans, although that is set to change later this season ...

The Old Firm derby was halted on Thursday afternoon ... with captain Nicolas Raskin gesturing to the home fans after the incident. Engels appeared to have a mark on his temple, near his eye ...