Contrasting half-centuries from B.J. Watling and Colin de Grandhomme helped New Zealand lead by 138 runs in their first innings against Sri Lanka on day four of the rain-hit second Test on Sunday. De Grandhomme, scoring 83 off 75 balls, and Watling, on 81, put together an unbeaten 113-run stand for the sixth wicket to frustrate the Sri Lankan bowling at Colombo's P. Sara Oval. Overnight centurion Tom Latham made 154 during a key 143-run partnership with Watling after the first session was washed out due to rain and wet outfield.