The Springbok medical team announced on Wednesday that a number of players had been put on intense rehabilitation programmes, following medical assessments in Cape Town.
Team doctor, Craig Roberts, said that a number of players faced a race against time to be fit to take part in the Castle Tri-Nations but that no one had been ruled out of contention for selection for the Rugby World Cup.
"Schalk Burger and Duane Vermeulen recently sustained serious injuries and will definitely not be ready to take part but we're hopeful that others who have had long-term injuries, such as Juan Smith, Heinrich Brüssow and Gurthrö Steenkamp, may be available at some point in the Series," he said.
"There are a number of other players who have been playing through Super Rugby with chronic injuries and need rehabilitation now to avoid the risk of the breaking down with longer term injuries in the near future."
Andy Marinos, manager of national teams for SARU, said that the medical team had taken a pragmatic approach to what is an intense international season.
"Some players have had a huge a huge amount of rugby and it shows in the wear and tear on their bodies," said Marinos.
"We're treating them on an individual basis to make sure they are fully fit to peak at the right times this year."
Marinos said that the Springbok squad for the Springboks' opening two Tests of the Tri-Nations would be named on Saturday.
Injured players unavailable for selection for the away leg of the Tri-Nations are: Duane Vermeulen (knee), Fourie du Preez (knee), Schalk Burger (thumb), Victor Matfield (calf and neck), Frans Steyn (ankle and back), Jaque Fourie (groin), Jean de Villiers (groin), BJ Botha (knee), Juan Smith (Achilles), Willem Alberts (shoulder), Bismarck du Plessis (shoulder), Andries Bekker (shoulder, groin and ankle), Jannie du Plessis (knee), Francois Louw (clavicle), Gurthrö Steenkamp (forearm), Francois Hougaard (ankle), Butch James (knee), JP Pietersen (back), Tendai Mtawarira (hamstring), Bryan Habana (shoulder), Bakkies Botha (knee).
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