Good evening everybody. We have an early start to play on day three due to much of day two being washed out.

The big news is that captain and century-maker Michael Clarke has declared Australia's innings closed at 7-494.

Play is scheduled to get underway at 7pm Sydney time - just moments away.

It's on! Ryan Harris bowls to Graeme Smith - and the ball swings quite a way back in to the left hander. It is overcast in Cape Town today and there should be a bit of movement for the bowlers on an otherwise good batting deck.

South Africa 0-5 after Harris's first over and now Mitchell Johnson will open from the other end.

Looking forward to seeing what Johnson does here. These condition, I think, will suit him perfectly. One more outstanding performance for the summer from Mitch?

Harris is keeping it full - and overpitches that one, which Smith square drives for four.