The former Bok lock took a big knock during Northampton's English Premiership match against Exter.
Flyhalf Owen Farrell scored 21 points as Saracens thumped Wasps, while there were also wins for London Irish, Exeter Chiefs, Leicester Tigers and Bath in the English Premiership.
No 8 Thomas Waldrom scored a hat-trick as the Exeter Chiefs beat Wasps 41-27, while there were also wins for Gloucester, Harlequins, Northampton, Leicester and Saracens.
SARugbymag.co.za looks back at the past weekend's English Premiership, French Top 14 and Celtic Pro12 matches, involving South African players.
Tim Swiel missed a last-minute penalty as Harlequins lost 26-25 to Exeter, while Northampton, Saracens and Wasps clinched wins in the English Premiership.
Wallabies utility back Matt Toomua will join the Leicester Tigers after next year's Vodacom Super Rugby tournament.
Saracens maintained their undefeated start to the English Premiership season with a 12-6 win over the Northampton Saints at Franklin's Gardens on Saturday.
Don Armand starred for the Exeter Chiefs in their 41-3 victory over the Newcastle Falcons in the English Premiership.
The Leicester Tigers have confirmed the signing of former Springbok captain Jean de Villiers.