The 31-year-old, who has been beset with injuries since he was named South Africa captain two years ago, suffered the injury during a match against the Waikato Chiefs in April and he said it is taking longer than expected to heal.
Initially the loose forward had been expected to return for the last part of Super Rugby’s regular season as the Lions seek a playoff place but those hopes have been dashed.
“I’m not 100% sure how long I’ll be out for, but we’re looking at about two months,” Whiteley, who also missed the early part of the Super Rugby season with a pectoral muscle tear, told South Africa’s Rapport newspaper on Sunday.
“I’ll take my time to ensure that I’m 100% fit when I return. I’ll probably play in the Currie Cup first and hopefully I get enough game time to come in contention for Springbok selection.”
South Africa play three Rugby Championship games between July 20 and Aug. 10, which are likely to come too soon for Whiteley.
Instead he will be targeting his return for the warm-up test against Argentina in Pretoria on Aug. 17 before the Boks head to Japan for the World Cup, which starts on Sept. 20.
Whiteley was named South Africa captain in 2017 but was injured after just two tests as skipper. He was then sidelined for the next six months with a groin injury.
On his return in early 2018 he suffered a knee injury that ruled him out of most of the Super Rugby season and kept him out of more tests, which paved the way for Siya Kolisi take over as Bok captain.
Whiteley returned to lead the Lions in a third successive Super Rugby final last August and then played for Springboks in the Rugby Championship, before his latest round of injuries.
“It has definitely been a challenge to get over the injuries but I’m full of confidence that my luck will turn and things will get better,” Whiteley added.
(Reporting by Mark Gleeson in Cape Town; Editing by Pritha Sarkar)
