Still only 26, Latham has recorded the second most runs by a New Zealand opener, at an average of 41.59, while Nicholls has established himself as a long-term number five with three centuries in 2018.
The pair added 214 for the fourth wicket, and Nicholls was full of praise for Latham, saying it was a special partnership.
"We're really great mates, we carpool every morning together to the ground.
"You look back at the 260 in Wellington and for him to come out yesterday in the second innings and basically hit reset and do all that hard work again is pretty cool. He's a very resilient guy and is one of the most hard-working guys I know. To see him have the discipline to do that for another 300 balls in this innings and to be out there batting with him was pretty special. He's a really inspirational guy and player.
"The way he batted yesterday and continued that on today like he did at the Basin last week gave me a lot of inspiration to try and do the same, and put us a team in a position where we're now in a chance to win the game with a lot of time left."
Nicholls also credited the selectors for sticking with him through an inconsistent start to his test career.
"I think I was really lucky. I learned a lot early in my career through a lot of failure. I consider myself very grateful and lucky the selectors and everyone in the team had a lot of confidence and faith in me that I'd use those experiences to make me a better player."
The selectors' faith has made off, and they'll be hoping to get more top performances from Nicholls and Latham in 2019.