For the win at Liverpool in midweek, no player on the pitch made more combined tackles and interceptions and in addition, it was Kante who played the long pass from which Mason Mount scored brilliantly to win the game.
Tuchel describes the importance of Kante for the rest of the season as "super big" but reveals the player is still being carefully managed due to the injuries that hampered him at times, especially last season.
"It was clear from the first second in training what this guy is capable of doing," he said.
"This is unbelievable and we see his intensity in the physical report after matches and we think maybe they tracked two people and put it into one sheet!
"It is unbelievable what he delivers in terms of intensity and ball recoveries and of devotion for a group. This is world class, the highest level, and we are very happy he is in our squad. He comes from injury. He will not play now all games 90 minutes before we arrive at the international break. We have to manage him.
"We do this now with our physical coaches and we have to take care that he arrives fit until the national break and when he comes back, this is normally the momentum where I hope we can rely on him in every game. I am very happy to have him and Kova and Jorginho in defensive midfield. This is exactly the level we need to win games at the highest level and I am super happy with all of them."