Steven Gerrard says his Rangers team has got to stand up and be counted when champions Celtic visit them on Saturday.
The Light Blues trail their Glasgow rivals by three points after being pegged back by Hibernian with a late leveller in a 1-1 draw at the Govan venue on Boxing Day.
The Hoops meanwhile had overcome Aberdeen at Pittodrie, coming out best in seven-goal thriller after a hat-trick from Scott Sinclair.
With Celtic also having played a game less, Gerrard says Rangers must regroup and pour themselves into the Old Firm atmosphere this weekend. Both sides will be playing their ninth and final games of a hectic December.
The players all need to come to see me individually in the next couple of days to tell me if they're in or out.Steven Gerrard
There's a lot of ice going on bumps and bruises," Gerrard said.
"But I've said to the players we have two options: we feel sorry for ourselves, or we regroup. We have 90 minutes to flip how everyone's feeling right now.
"The players all need to come to see me individually in the next couple of days to tell me if they're in or out."
Celtic will remain top going into the winter break unless Rangers win by four goals or more. Brendan Rodgers has yet to lose to Rangers during his two-and-a-half-years as Celtic manager.
Gerrard's men are 2/1 to win and the former England skipper is urging them to feed off the fans.
"For the Celtic game, we'll do everything we can to make the starting XI as strong as possible," said Gerrard.
"We have to try to use [the home crowd] to our advantage. We owe it to them to find 90 minutes then we can go and rest."
Celtic are 7/5 for the win, with a draw priced at 11/5.
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