Kane Williamson kept his head while all around him were losing theirs, reaching an unbeaten century to steer New Zealand to a tense 5 wicket win over Sri Lanka in the second test , and a 2-0 sweep of the two-test series.
Williamson ended 108 not out after resuming at 78 as New Zealand progressed from 142 for 5 overnight to reach its winning target of 189 after only 55 minute play on the fourth morning of a match which saw dramatic changes of fortune.
