CSA said that Duminy would undergo surgery to re-attach the tendon and could be out of action for up to six months.
Brisbane: South African batsman and occasional bowler JP Duminy, who was injured in the warm-down after the first day of the first Test against Australia, has been ruled out of the reminder of the first Test with a possibility of being sidelined for three to six months from the game.
The 28-year-old, who was expected to support a four-pronged pace attack with his off spin, hurt his left ankle in a fall while running on the pitch and had to be helped off before being taken to hospital for a scan.
Scans revealed that Duminy has suffered an Achilles tendon in his left heel. "He was running in the shuttle sprints and heard a pop," Mohammed Moosajee, the South African team manager, told ESPNcricinfo. "He has ruptured his Achilles tendon."
The South Africans, who finished an otherwise excellent day at the Gabba on 255 for 2, left legspinner Imran Tahir out of the team for the Test and instead handed a debut to seamer Rory Kleinveldt.
Batsman Alviro Petersen conceded that Duminy's bowling had been a factor in dropping Tahir and going with Kleinveldt.
"We felt that Rory was going to offer us some more on that wicket, it wasn't as hard as we thought," he told reporters.
"We felt that Australia has got so many left-handers that JP could play a big role for us with the ball, if needed. And that was the reason why we have probably gone with Rory."
Duminy, who played a major role in South Africa's first ever series win in Australia four years ago, was scheduled to bat at number seven.
"Hopefully he'll be fine," Petersen added.