Cape Town - Springbok centre Frans Steyn's ankle injury is worse than initially though which will see him remain on the sidelines for the next three months.Steyn was on Friday ruled out of the Bok Test against Australia over the weekend after injuring his ankle in training last Monday.News emanating from the Springbok camp now indicates that Steyn's ankle injury is worse than initially feared which will see him undergo an operation on Wednesday.Well-known rugby scribe Brenden Nel confimed the news via his twitter account."Frans Steyn out for three months. Ankle injury worse than expected. Will operate wednesday #Boks #Rugby," Nel tweeted after speaking to the team doctor, Craig Roberts.Nel also said fullback Zane Kirchner is in trouble after he injured his hip in the 31-8 win over the Wallabies. He will be assessed later in the week, while flank Jacques Potgieter is out of the reckoning with an abdominal strain.The Boks take on the All Blacks in Soweto on Saturday to conclude their Rugby Championship campaign.Kick-off at the FNB Stadium is 17:00 on Saturday.