Scott Robertson urges New Zealand to continue improving

New Zealand head coach Scott Robertson believes the All Blacks can continue to strive for improvement despite their 2-0 defeat against England.

Having started the series with a 16-15 win over Steve Borthwick's men in Dunedin, New Zealand riding on a double try effort from Mark Telea steered them to a 24-17 victory to keep their formidable record at Eden Park.

The win also ensured All Blacks completed a 2-0 series win over England which was also the first under Robertson, who replaced Ian Foster as the head coach earlier in the year.

"It's coming. We're training it. We've got to put it on the field now," said Robertson to the All Blacks official website.

"There's no doubt that we...everyone knows it, that we can be way more efficient in parts of our game.

"I'm not sure [assistant coach] Scott Hansen slept all night. He came out of that box and said, 'Yeah, we'll take it, but we've got to be better.' That's our mindset."

Robertson noted that although they managed to win through two intense battles, they missed some opportunities and needed to capitalize on them in the future.

The key takeaway from the first two Tests, he said, was that victories aren't always pretty when facing pressure from opponents.

"You've got to find a way. You've got to think on your feet and come up with the next plan. You put so much trust in the guys on the field.

"A lot of the messages you send, they don't get in time just because of the nature of the game. The preparation you do sets them up to be the best they possibly can be.

"We learned some lessons. Luckily, we won and learned, not lost and learned."