A highest ever individual score for a batsman at a Cricket World Cup from Martin Guptill helped New Zealand into the tournament's semi-finals.

Guptill smashed an unbeaten 237 from just 163 balls against the West Indies, as the co-hosts piled-up a score of 393 for 6 in Wellington.

They then bowled out their opponents for 250, to complete a 143-run victory.

New Zealand will now play South Africa in the last four, while Australia go up against India in next week's other semi-final.