Colombo: New Zealand's BJ Watling and Colin de Grandhomme helped their team on day four of the second Test to gain a 138-run lead over Sri Lanka at P Sara Oval Stadium here on Sunday.

Tom Latham and BJ Watling resumed New Zealand's first inning on day four from 196/3. Latham, who started the day on 111, completed 150 runs and stitched a 143-run partnership with Watling, who went on to score his half-century.