Read said each game was different but at the same time it involved striving to be better and that would be the same against Tonga.
"It's important that we are focused on this game and this game only," he said.
"It's a Test match for us and we've prepared this week as if we were playing any other team in the world. This week it's Tonga and all our focus has been on them.
"When we get through this game on Sunday we'll prepare for the next one," he said.
Read said he was expecting a lot from Tonga because they had played a lot of games this year and they had improved with each outing.
"We know their support will be strong and they're a team that's got so much pride in their jersey and their country so it will be a big game," he said.
Having played Tonga twice at World Cups, Read said they had improved over that time, but he said it was always hard for Tonga to field their best team because their top players were not always available.
"That's something to be worked on over the coming years, but when they do have that team they are a dangerous side," he said.
Read said it would be good for replacement first five-eighths Josh Ioane to get some time off the substitutes' bench in the game.
He had done a lot of work with the group over the last couple of months.
"He's done what he needed from his point of view so it is exciting for him," he said.
And it was good to have Crusaders' teammate Ryan Crotty back in the side for the game.
"Obviously he's had a bit of time off, he needs some footy under his belt heading to the World Cup so he's an integral part. He's part of our leadership group in our team so I expect him to go well tomorrow," he said.
Read said that while the game would be his last for the All Blacks in New Zealand he hadn't thought about it, and would be able to reflect on it later.