The Black Cap's second test against the Proteas is delicately balanced going into day four. South Africa were 140 for five at stumps yesterday, holding a lead of 211 runs at Hagley Oval in Christchurch.
New Zealand will have to get stuck in quickly, if they're going to edge the tourists out of their slender lead.
Cricket commentator Bryan Waddle has been watching the game.
He spoke to Susie Ferguson.
