Bayern Munich striker Harry Kane scored the only goal of the game, securing a 1-0 victory for England.
Tuchel shared his concerns, saying he was worried about the team's attitude in the final 20 minutes of the game.
"I didn't like the lack of urgency and it didn't match the occasion - it's still a World Cup qualifier," he explained.
"We lacked the seriousness and urgency needed in a World Cup qualifier," Tuchel added.
He also mentioned that the team started well in the first 20-25 minutes, creating several chances, but lost momentum and failed to regain it in the first half.
Although they managed to get back into the game in the second half, Tuchel felt that their performance was not good enough in terms of urgency.
"We need to look at this in detail and do better in our next match," he concluded.