Lions fly-half Elton Jantjies is set for scans on Tuesday to determine the extent of a possible medial ligament injury.
The news is hardly ideal for the Lions after last Saturday's 50-17 humbling at the hands of the Hurricanes at Ellis Park.
Jantjies limped off in the second half and the frontrunner for the Springbok fly-half slot against Ireland next month now faces a nervous wait to discover the extent of the damage.
One of the Lions best players this year, head coach Johan Ackermann is understandably concerned about the fitness of his star number ten.
“Elton has a little bit of a knee, at this stage it is a medial ligament but we are not sure of the extent of it," Ackermann told Supersport.
"The moment we are sure we will send out the report but we will probably only know by Tuesday because of the holidays. The doctor said he will only be able to do a scan on Tuesday."
Ackermann also provided a fitness update on the condition of prop Julian Redelinghuys (wrist) and hooker Malcolm Marx (neck) who he hopes will both be available when the Lions return from their bye week to face the Blues.
He added: “I hope so they really recovered well in two weeks. They have another two weeks and we will continue to treat them. They were close and Malcolm in particular was really close.
"So hopefully they will be ready for the next game."