Sharks director of rugby Neil Powell confirmed on Friday that lock Eben Etzebeth faced a lengthy period on the sidelines.The Springbok enforcer suffered a shoulder injury in last weekend's 50-35 last 16 win over Munster in Durban.Speaking to reporters, Powell said that Etzebeth's season with the franchise was probably over.Powell, however, believed that Etzebeth should be available for the Springboks as they look to defend the Rugby World Cup in September.“In terms of how long he will be out for, I think it’s quite a long time," said Powell. "I’m not 100 percent sure, but probably 12 or 14 weeks."I don't think he’ll play for us again this season, but he will definitely be ready for the World Cup," Powell added.Ezebeth isn't the only injury worry for the Sharks and South Africa, with scrumhalf Jaden Hendrikse also set for a lengthy period on the sidelines following a shoulder injury on the weekend.