Rory Steyn, who was chief bodyguard to Nelson Mandela, has suggested the betting syndicates sought to poison the side in order to make huge money from an upset, with New Zealand the favourites going into the game.
Steyn revealed that the All Blacks squad ate away from the rest of their hotel guests in the days before the match, such was their level of concern.
"I believe it was the water that was got at, because the food that was served at lunch time… was chicken burgers and hamburgers.
"I don't think it was the food, I think it was the coffee and the tea and possibly even the drinking water.
"I know what I saw… A team of guys lying on the floor, very, very ill."
South Africa won the game 15-12 thanks to Joel Stransky's late drop goal, sparking memorable scenes at Ellis Park as the Springboks celebrated a first Rugby World Cup triumph, with the trophy presented by Mandela.