The Black Caps are in a commanding position in first test against South Africa.
They finished day three at 179/4, a massive 528 runs ahead, thanks mainly to Kane Williamson's second century of the test.
Williamson backed up his 118 in the first innings by blitzing his way to a 31st test century off only 125 balls late on day three.
Former Black Caps wicket-keeper Peter McGlashan spoke to Corin Dann.
