Martin Guptill's 93 of just 30 balls, helped New Zealand post 10 wicket victory over Sri Lanka in the second ODI played at Christchurch. Guptill smashed 8 sixes and 9 fours in his blitz innings, and helped chase down the target of 118 in just 8.2 overs.Earlier, the Lankans were all out for 117 in 27.4 overs. Matt Henry and Mitchell McClenaghan took seven wickets among themselves for the hosts to ristrict the visitors to such a low total.New Zealand are up in the 5 match ODI series 2-Nil.