Petersen closes on ton but rain rules

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Alviro Petersen edged towards a third Test century as South Africa dominated yet another rain-affected day against New Zealand.

Only 79 overs have been bowled on the opening two days, though the Proteas - 1-0 up after two Tests - hold the advantage in the third and final encounter after adding 110 runs for the loss of no wickets today.

Petersen and JP Duminy, who finished unbeaten on 96 and 76 respectively, extended their partnership to 140 runs.

The former enjoyed some good fortune, having been dropped on 68 by Martin Guptill off seamer Doug Bracewell.

Duminy, though, was untroubled throughout his stay and will look to push towards a hundred tomorrow in what is his first Test appearance for two years.