South Africa are going to be absolutely desperate to level the series. Facing the potential of losing a series not only at home, but to a team which has beaten Austrlia, who themselves conquered, leaves them with a somewhat tenuous perspective of losing their number 1 status. To England of of people.
Of course the rankings won't reflect this, but the pain of losing certainly will.
All I can say is that I hope SA haven't been practising their catches ones one of these - my son had one float down the chimney, now can't tell the difference between him & Jonty Rhodes!