LONDON :South Africa captain Siya Kolisi paid tribute to coach Rassie Erasmus for changing his team's mindset after they underlined their status as the sport's superpower by winning back-to-back Rugby Championship titles for the first time on Saturday. The 29-27 scoreline does not quite tell the whole story of a wonderful occasion at Twickenham as Argentina finished strongly, but meant the Springboks took the title on points difference over New Zealand, who beat Australia earlier in the day.