South Africa take on Argentina in the bronze final of the Rugby World Cup at London's Olympic Stadium tonight. Both sides will be hoping to end their campaigns on a high with a third-place finish.Injury-ravaged Argentina have made nine changes to the side that lost to Australia in the semi-final, while the Boks have opted for minimal adjustments to the team downed by the All Blacks. Meanwhile, the actual final, which pits New Zealand against Australia, will be played at Twickenham tomorrow.