Cast your mind back to the winter of 2021, Rangers were flying at the top of the league and had qualified for the knockout stages of the Europa League whilst Celtic were struggling for results and with injuries. Covid-19 was still lingering and despite no other country in Europe making any changes to their schedule, the SPFL decided to bring the winter break forward, conveniently, right before a crucial Old Firm derby. On the other side of the break, Rangers saw a congested fixture list contribute to their own injury problems as Celtic added fresh legs and more quality, a new look team swept a…