Williamson, Ravindra centuries lift New Zealand against a spirited South Africa

Williamson was 112 not out at stumps and Ravindra 118 in an unbroken partnership of 219.

For much of the day, scoring had been difficult. New Zealand scored 65 runs from 25 overs in the first session and 60 runs from 27 overs in the second as a novice South Africa attack produced a spirited performance and tied down the New Zealand batters.

The payoff for that hard graft came in the extended last session when New Zealand scored 133 from 34 overs, bumping up their run rate for the day to three runs an over.

Both players at times were frustrated by the slow pace of scoring. Williamson adapted and persevered through an innings which had lasted almost 6-1/2 hours by stumps. Ravindra had a knack of picking out fielders when he played forcefully but he showed maturity to concentrate and carry on.

Both players gave catching chances: Williamson at 47 when he was dropped by Edward Moore from the bowling of Ruan de Swardt and Ravindra by Duanne Olivier off the same bowler when he was 80.

Otherwise they negotiated the day with patience and gradually put New Zealand in command.