HAMILTON (AFP) - A world-record T20 partnership by Martin Guptill and Kane Williamson gave New Zealand a comprehensive 10-wicket win in the second Twenty20 against Pakistan in Hamilton on Sunday.

Set a target of 169, Guptill finished the match with a boundary to take the New Zealand total to 171 with 14 balls remaining and all wickets intact.

His stand with Williamson eclipsed the previous best Twenty20 partnership of 170 set by South Africans Graeme Smith and Loots Bosman against England in 2009.

New Zealand's dominance in Hamilton, after Pakistan won the first game in Auckland on Friday, means the three-match series will be decided in Wellington on Friday.

Guptill, who uncharacteristically trailed Williamson for much of the match, finished with a flourish to be 87 not out from 58 balls with nine fours and four sixes.

Williamson faced 48 balls for his 72, which included 11 fours.

Pakistan made 168-7.