Dylan Sage and Stedman Gans have also returned to the squad.
Sage, who missed the last two tournaments in Dubai and Cape Town due to a back injury, comes in for the injured Chris Dry while Gans replaces Branco du Preez, who picked up a hamstring injury in training last week.
‘We made the call to take Sikhumbuzo along as a reserve player in order for him to get first-hand experience of what a Sevens Series tournament is all about and he will be called upon if anyone picks up an injury,’ explained Blitzboks coach Neil Powell.
‘Dylan has been training solidly over the past couple of weeks, while Stedman was in very good form for the Academy side in South America, so I am expecting solid contributions from them next weekend. We are losing four players to their Super Rugby teams after the Hamilton tournament, so we need a strong tour in order to stay in contention for the overall title.’
The Blitzboks are currently second after New Zealand on the overall Sevens Series log. They are the defending champions in Sydney and will face Papua New Guinea, Spain and England in Pool C of the tournament, which starts on 26 January.
Philip Snyman Dylan Sage,
Here are the fixtures for this year:-
HSBC World Rugby Sevens Series 2018 Dates:
Round3 – Sydney: 26-28 January 2018
Round4 – Hamilton: 3-4 February 2018
Round5 – Las Vegas: 2-4 March 2018
Round6 – Vancouver: 10-11 March 2018
Round7 – Hong Kong: 6-8 April 2018
(Commonwealth Games 2018, Gold Coast: 14-15 April 2018)
Round8 – Singapore: 28-29 April 2018
Round9 – Paris: 26-27 May 2018
Round10 London: 2-3 June 2018
(Rugby World Cup Sevens 2018, San Francisco: 20-22 July 2018)