If Kolisi has surgery, the recovery time is typically nine months, Independent Newspapers said, ruling the flanker out of the Springboks’ title defence in France. The World Cup starts on September 8.
Kolisi could avoid surgery and opt for rehabilitation, but that would still keep him out of action for at least four months and in a best-case scenario he’d return to action only a few weeks before the World Cup, the report said.
Kolisi was South Africa’s captain when they won the 2019 Rugby World Cup in Japan to equal the All Blacks’ record of three titles. This World Cup is expected to be the last for the 31-year-old loose forward, who will join French club Racing 92 after the rugby showpiece.
Before the World Cup, South Africa play tests against Australia, New Zealand and Argentina in a shortened Rugby Championship in July.
The Springboks open the Rugby World Cup against Scotland on September 10 and also play top-ranked Ireland, Romania and Tonga in Pool B.