Cape Town - Bulls loose forward Marco van Staden was on Monday added to the Springbok training group and will join the rest of the squad immediately at their preparation camp in Pretoria.

Van Staden has been drafted in as cover for Siya Kolisi and will remain in camp until there is absolute clarity about whether the Bok skipper will be able to take part in the initial stages of the Rugby Championship.

The Springboks will kick off their shortened Rugby Championship campaign on Saturday, July 20, against the Wallabies in Johannesburg, which will be followed a week later by the keenly awaited rematch with New Zealand in Wellington - the scene of last year's epic away win against the All Blacks.

The Boks will conclude their official campaign against Argentina two weeks later, on Saturday, August 10, in Salta, while the same two teams are set to meet again a week later in Pretoria in a once-off Test before the Boks report for Rugby World Cup training duty.

Updated Springbok training group in Pretoria:

Forwards

Schalk Brits (Bulls), Marcell Coetzee (Ulster, Ireland), Lood de Jager (Bulls), Thomas du Toit (Sharks), Pieter-Steph du Toit (Stormers), Rynhardt Elstadt (Toulouse, France), Eben Etzebeth (Stormers), Lizo Gqoboka (Bulls), Steven Kitshoff (Stormers), Vincent Koch (Saracens, England), Siya Kolisi (Stormers), Francois Louw (Bath), Frans Malherbe (Stormers), Malcolm Marx (Lions), Bongi Mbonambi (Stormers), Tendai Mtawarira (Sharks), Franco Mostert (Gloucester, England), Trevor Nyakane (Bulls), Marvin Orie (Lions), Kwagga Smith (Lions), RG Snyman (Bulls), Marco van Staden (Bulls), Duane Vermeulen (Bulls)

Backs

Lukhanyo Am (Sharks), Damian de Allende (Stormers), Andre Esterhuizen (Sharks), Faf de Klerk (Sale Sharks, England), Aphiwe Dyantyi (Lions), Warrick Gelant (Bulls), Elton Jantjies (Lions), Herschel Jantjies (Stormers), Cheslin Kolbe (Toulouse, France), Jesse Kriel (Bulls), Dillyn Lleyds ( Stormers), Makazole Mapimpi (Sharks), Sibusiso Nkosi (Sharks), Willie le Roux (Toyota Verblitz, Japan), Handre Pollard (Bulls), Cobus Reinach (Northampton Saints, England), Frans Steyn (Montpellier, France)