In slightly over 24 hours, Rangers lock horns with Celtic in the first Old Firm derby of the season. It's a massive game for Pedro Caixinha's side who could be eight points behind the Hoops and six behind Aberdeen if they were to lose at Ibrox tomorrow.
And worryingly for Rangers fans, one of their best players, Bruno Alves, may not be fit.
The Portugal defender started the League Cup victory away to Partick Thistle on Tuesday, where he limped off with a calf problem and his participation against Brendan Rodgers's side is now in doubt, with supporters on Twitter claiming that he was spotted at Glasgow airport this morning ahead of a trip to Spain for treatment.
But did Caixinha need to start him in midweek? Sure, he obviously wants to win the League Cup, evident by the fact he named all of his heavy hitters in the first XI, but it was a needless risk by a manager whose future in Glasgow is far from secure.
Celtic in the league is by far the bigger game than Partick in the cup because defeat tomorrow is much more detrimental to their season, but the 46-year-old, who has already lost captain Lee Wallace to injury, took a big gamble and it might've backfired.
Alves is a man of 35 years and 94 Portugal caps and the risk of Rangers - who lost 5-1 to Celtic on two occasions last term - suffering another humiliating defeat is much lower with him in the side.
If he isn't fit, it's up to 19-year-old Ross McCrorie and summer signing Fabio Cardoso to keep the likes of Moussa Dembele and/or Leigh Griffiths at bay. It's ominous and the finger of blame should be pointed solely at Caixinha if Rangers are given another lesson by their greatest rivals.