Francois Steyn has been ruled out of South Africa's Tri-Nations match against New Zealand in Soweto on August 21 due to a thigh injury.
The full-back hurt his quad muscle in a pre-season game for his club Racing Metro and has been advised not to train until next week.
The South African Rugby Union (SARU) have been frustrated in their attempts to clarify with Racing the extent of Steyn's problem.
The Springboks management are keen to know if he will be available for their last two Tri-Nations home games against Australia on August 28 and September 4.
"The injury situation has to be dealt with first, but we are hopeful Frans will be available to us after the All Blacks match," said SARU's manager of national teams Andy Marinos.
He said they have followed International Rugby Board protocol with Racing Metro and the French Rugby Federation to make Steyn available but believe he was being held back by his club, which wants to play him on the day of the All Blacks test in a Top 14 fixture.
"We followed the protocol and sit now with the frustration of not having all the relevant information from the doctors so that (coach) Peter (de Villiers) and the selectors can see the extent of the injury," Marinos added.
"What is concerning is that the communication has been scarce, in spite of persistent attempts to get clarity on the matter. The notification process is quite clear and in terms of the regulations, the player can't be held back.
"Whether we persist or not it won't make any difference next Saturday but we now want the assurance of when Frans will be available."