It's another perfect day for cricket here at Sahara Park Newlands. After a bit of a wobble upfront, with both Smith and Gibbs going out for relatively low scores (Smith for 8 and Gibbs for a slightly more respectable 26), South Africa has picked up the pace somewhat, thanks to the efforts of De Villiers and Kallis.

They've been showing a bit of intent with the bat, with a number of balls racing away towards the boundary, to be stopped just short of it by an alert fielder. Both have now reached their half-century - and that's always a good sign for a top-order batsman.

Mitchell Johnson's bowling has been pretty impressive, as always - he's bowled 7 overs, taken 1 wicket, and gone for only 15 runs.

The run rate is now sitting at 4.6 to the over - it's been climbing slowly but steadily during the Kallis/De Villiers partnership. In fact, it seems that every time I glance back at the scoreboard it's incremented by another 0.1/over!

15 overs to go - let's see what they can do...