Rangers' medical staff have branded Elliot Smith's challenge on DaMarcus Beasley as a potential leg breaker.
American midfielder Beasley was on the receiving end of a horrendous challenge from Smith during the Gers' Scottish Cup victory over Forfar on Wednesday.
The shin-high tackle did see a red card brandished in the direction of the Forfar man, but that would have been scant consolation had a serious injury been inflicted.
As it was Beasley walked away from the incident relatively unscathed, with a minor knock only expected to keep him out of the weekend trip to Hamilton.
Rangers said on their official website: "Beasley has been very lucky. He was caught on the shin by a horrendous challenge from Forfar full-back Elliot Smith, who was immediately sent off.
"However, the Murray Park staff reckon the fact that his foot was off the ground when he was hit saved him from a broken leg."
Meanwhile, Rangers have revealed that Lee McCulloch looks set to miss the CIS Cup final after sustaining a calf injury in midweek.
The midfielder has only recently forced his way back into Walter Smith's plans but is now facing up to four weeks on the sidelines following his latest setback.
That initial prognosis would rule McCulloch out of an Old Firm showdown with Celtic at Hampden Park on 15th March.