Aitor Karanka says that Boro are keeping their feet on the ground ahead of Saturday's home match against Crystal Palace.
Boro boast an unbeaten record after three Premier League fixtures so far, with top flight football returning to the Riverside for the first time since the opening day of the season.
But Karanka says Boro are taking nothing for granted in what is another tough fixture.
"It will be a really difficult game," he said.
"We are in really good form but we shouldn't get carried away. Last season, two or three months ago, we were playing in the Championship so we have to keep calm.
"We have to fight every single game as if it were a final because every three points is vital."
Boro's Head Coach says that the manner of Boro's displays have pleased him as much as results so far.
"It's not about whether we are unbeaten or not, it's not about whether we have three points, or five, or seven," he said.
"In the performances we are showing to everybody we are ready for this league.
"We have spoken a lot of times about how big and good our squad is.
"But if you look at the first 11 when we played against West Brom, eight players were here last season.
"I am really pleased because all of them are ready to play every single game."
Karanka says that Boro must be wary of a Palace side that will come to the Riverside fighting for points.
"It is going to be a tough game, especially when Crystal Palace are not in a good way," he said.
"They have very good forwards, and they will be doing everything to add points.
"In one or two weeks, everything can change, so we have to forget the past and focus on the next game."