New Rangers man Nnamdi Ofoborh won't feature "in the short term" after scans revealed an issue with his heart.
The 21-year-old moved to Ibrox on a free transfer from Bournemouth this summer but hasn't featured in any of the pre-season friendlies.
That's led to some confusion for fans, and manager Steven Gerrard moved to clear it up after the friendly with Arsenal.
The scans players are subjected to when they arrive at a new club flagged up a heart issue and, in a summer that saw the world watch in horror as Christian Eriksen collapsed on the pitch, Rangers will be taking absolutely no chances.
Gerrard explained on Rangers TV: "I don't think you'll see him in the short term.
"Unfortunately something has flagged up with his ECG, which is the heart test. We've got top medical people here at the club now and we check all the players thoroughly from head to toe when they arrive.
"Unfortunately there's been a bit of a red flag with a heart issue so he's going to see some specialists in the coming weeks and we need to do more tests before we move forward.
"It's disappointing and frustrating but we'll have to manage and cope.
"The important thing is the player's health, which we'll obviously focus on first and foremost.
"Of course it's disappointing and frustrating for the player but I spoke to him yesterday and told him to keep smiling and be patient.
"We'll do everything we can to support him, get him in front of the right people with the right support, and hopefully he'll be back before too long."
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