India captain Sourav Ganguly apologised to Indian cricket fans after another sub-standard display saw his team lose both the fourth one-day international against New Zealand and the seven-match series.

"We are just playing for pride now," the India captain said, after New Zealand won by seven wickets to take a 4-0 lead in the series.

"We feel we are letting everybody down -- the coach, the physio, the trainer, the manager and all the people back home," he said.

"We have been getting some good crowds here with plenty of Indians, and we're letting them down.

"This is the worst time we have had since I became captain," Ganguly said. "I have been captain for three years and I have never felt this bad. We have really been poor this series and we need to play for pride now."

India, batting on a pitch which Ganguly described as "a great wicket", scored 122, with Yuvraj Singh making 25 and Virender Sehwag 23. New Zealand's Andre Adams took his first five-wicket haul to claim five for 22.

New Zealand passed the India total in 25.4 overs, with Stephen Fleming scoring 47 and Mathew Sinclair 32 not out.

India also lost the Test series 2-0.

Asked about the mood of his team in the run-up to the World Cup, Ganguly said: "The World Cup is a new series and a new tournament.

"We'll go there and play and put this stuff to the back of our mind."

Ganguly got a small measure of sympathy from his New Zealand opposite number Fleming.

"They [India] are feeling pretty demoralised at the moment," he said. "It's been a pretty tough tour for them, but we are in no mood to let them off. We have been putting the ball in areas that's making them uncomfortable.

"We want to go to South Africa with good form under our belts, and we could be more polished than we have been and I still expect them [India] to fire."

Fleming said he would like to see bigger scores posted in the one-day series "to test ourselves out".