The duo joined the Blitzboks squad on Monday afternoon at their team hotel in Cape Town. Kok, the current World Rugby Sevens Player of the Year, sustained a knee injury in Dubai over the past weekend, while Afrika has a troublesome hamstring.
South Africa returned home on Sunday after winning the Plate Final at the season opening Dubai Sevens tournament on Saturday.
The Blitzboks are the defending SA tournament champions and will be aiming for a third home title in a row when the inaugural HSBC Cape Town Sevens will be staged at the 55 000-seater Cape Town Stadium this coming Saturday and Sunday.
