Maartin Guptill heroics steers Black Caps to win New Zealand take an unassailable 2-0 lead in their one-day series against England, after a comfortable 86-run win in Hampshire. Martin Guptill on his way to his record-breaking score at Southampton Source: AP MARTIN Guptill has made the highest one-day international score by a New Zealand batsman as the Black Caps took an unbeatable 2-0 lead in their series with England. Guptill's 189 not out was the cornerstone of New Zealand's 3-359 at Southampton the largest total England had conceded in a home ODI. England, despite Jonathan Trott's unbeaten 109, could only manage 273 in reply as they lost by 86 runs, with 35 balls of their innings left, as New Zealand gained a measure of revenge for their 2-0 Test series whitewash by Alastair Cook's men. This defeat, which saw an attack again missing injured seamers Stuart Broad (knee) and Steven Finn (shin), struggle, raised questions about the hosts England's prospects in the one-day Champions Trophy tournament that starts on Thursday and ended a four-year unbeaten run in home ODI series. The 26-year-old Guptill's innings surpassed Lou Vincent's previous New Zealand record of 172 against Zimbabwe in Bulawayo in 2005, and was the equal fifth highest score in ODI history. This was also the opener's second hundred in as many matches after his 103 not out powered New Zealand to a five-wicket win at Lord's on Friday. Only Mark Greatbatch, in 1990, had previously made an ODI century for New Zealand in England, when he too scored back-to-back hundreds. But, as happened at Lord's, Guptill was again dropped on 13 with Chris Woakes once more the unlucky bowler when a pull went straight through Trott's hands at mid-wicket. That was the only chance Guptill gave in a 155-ball innings featuring two sixes and 19 fours that equalled West Indies' great Vivian Richards' 189 not out, in a 55-over match at Old Trafford in 1984, as the highest individual ODI score against England. "When Martin Guptill is going, few guys in world cricket strike the ball as well as he does," New Zealand captain Brendon McCullum said at the presentation ceremony. The way we have responded since the Test series has been really good and we need to continue building our momentum for the Champions Trophy. England captain Alastair Cook admitted his side had been outclassed in the series thus far. "Clearly we have been outplayed in both matches and it's hurt us, but we have to learn why and get better," he said. The Champions Trophy is very important and we have to do a lot better. The third and final match of this series takes place in Nottingham on Wednesday.