Cheetahs coach Franco Smith confirmed that Petersen will be sidelined for four to six weeks with medial collateral ligament damage .
Cheetahs coach Franco Smith spent a substantial portion of this week in Cape Town after being appointed as a Springbok assistant coach .
Cheetahs coach Franco Smith , who spent a substantial portion of this week in Cape Town after being appointed as a Springbok assistant coach , confirmed that Petersen will be sidelined for four to six weeks with medial collateral ligament damage .