England head into the last-32 clash against DR Congo in North America after building momentum in the group stage.
The Everton goalkeeper highlighted the intensity and discipline Tuchel has brought since taking charge, saying the team is fully committed to his methods.
Despite ongoing scrutiny over the German coach’s tactical approach, the players remain united and focused as they enter the decisive phase of the tournament.
"Belief, togetherness. I think we have had that previously, but I think the manager’s got that belief in us," Pickford told BBC Sport.
"The meetings the manager has with us, it is like you are ready to go to war. He puts that belief in you. There is different meetings he has tactically, and it is like ‘yeah, it is go time’.
“We all want the same goal, we all want that end goal and this squad he has picked, we are all in good spirits and all in good moments in our career."