Steven Gerrard admitted he could drop Alfredo Morelos for Rangers' Europa League showdown against Bayer Leverkusen on Thursday night.
The striker has only scored one goal since the winter break after hitting 29 during the first half of the campaign.
The Ibrox boss admitted his loss of form is a worry and could opt to start Florian Kamberi against the Germans for the first leg at Ibrox.
The on-loan Hibs forward put in a brilliant performance during Rangers' 1-0 win over Braga in Portugal in the last round as he lead the line.
Gerrard said: "I think one thing's for sure, for us to have any chance of progression through this stage, we're going to need all our players in form and at it.
"They need to bring their best and max-out over the course of the 90 minutes. Alfredo is no different.
"I think Alfredo's aware of where his form is at. We're all aware of that. But we all know he's very capable at this level against this type of opposition.
"Him being at his best, taking chances for us, gives us a better chance of progressing.
"But I've got a decision to make with the number nine position."
Rangers also have a few injury worries to cotend with.
James Tavernier injured his foot against Hamilton last week and sat out Sunday's win at Ross County - but Gerrard is refusing to rule the Englishman out just yet.
Ryan Jack is out with a recurrence of his calf issue. Filip Helander stepped up his recovery from a foot issue with a 45-minute run out against Brentford's reserves on Tuesday, while Jon Flanagan and Jordan Jones have been left out of the Europa League squad.
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