Steve Hansen says he would not be surprised if England break New Zealand's record for consecutive international victories next year.
If England - who are up to 14 straight wins after an unbeaten 2016 - win the Six Nations Grand Slam in March, they will have chalked up 19 in a row, beating New Zealand's record of 18.
The All Blacks' run started in August 2015 and was ended by Ireland in Chicago on November 5.
New Zealand coach Hansen says Eddie Jones' men have the ability and drive to overhaul his team's record.
"Of course they can, if they've got the mental fortitude to get up every week and play well," Hansen told Radio Sport.
"We know they're capable of beating them, they went through the last year undefeated. It's there for them to have a crack at.
"It's obviously a very tough thing to do from a preparation and mental point of view without sub-consciously letting complacency slip in."
Hansen believes a combination of the pain of England's 2015 World Cup trauma, and Jones is driving England.
"The one thing England have in their favour is that they've had a lot of adversity," he said.
"That World Cup really hurt those players and they've got a steely determination to want to do better and a coach who's driving it.
"That's a good combination to put a lot of wins together."