Willie Collum helps ex-Rangers star to first Champions League goal

Controversial Scottish referee awards a Champions League penalty to Young Boys which is duly dispatched by ex-Rangers striker Cedric Itten.

Willie Collum Rangers vs Celtic record examined as experienced whistler handed Scottish Cup semi-final - Football Scotland

Celtic warm up for Old Firm derby with victory against Dundee United

Fans laugh at Old Firm's 'angry' ref for 'wrestling' stars - Daily Star

Christopher Jullien's second half strike sees ten-man Celtic claim dramatic Scottish League Cup final victory over Rangers

Why do Rangers fans continue to indulge unfit, untrustworthy and unreliable' 165-goal star, queries pundit

Celtic 1-1 Rangers: Morelos keeps Gerrard's champions unbeaten

Furious Steven Gerrard blames referee for his first defeat as Rangers boss against Celtic

Rangers 1 Hibs 2: Jamie Maclaren and John McGinn strike as Neil Lennon's men do the Premiership double at Ibrox

Willie Collum handed Ross County vs Celtic as Rangers vs Dundee United and rest of Premiership referees announced - Football Scotland

Alfredo Morelos - Wikipedia