The 38-year-old was complaining of chest pains and was reported to be in a stable condition after arriving at the hospital.
Kruger, meanwhile, fell unconscious at the wheel of his car as he was driving home his wife and two children. The 39-year-old former back row star recently had a brain tumor removed.
He was admitted to the intensive care unit at Pretoria East Hospital, where he was in a serious but stable condition. He suffered serious head and facial injuries in the crash, although his wife and two daughters received only minor injuries.