With the Bulls and Stormers both beaten in Europe last weekend while the Lions and Sharks won at home, Saturday's two SA derbies carry real stakes — redemption for the hosts, momentum consolidation for the visitors. Wynona Louw identifies the key individuals likely to swing each match. For the Stormers-Sharks clash, the piece centres on Damian Willemse's return to the starting XV (with Gelant dropped), Siya Kolisi needing a winning performance in a Stormers jersey, and a potentially season-defining front-row battle between Ox Nche and Wilco Louw in what Louw calls a 'seismic' scrum contest. The Sharks' threat comes through a resurgent Eben Etzebeth and Jordan Bosch, who carries Bok ambitions and a point to prove after a costly error in Limerick.