Chelsea took the lead early in the game against Zenit and it felt like the Blues were going for a comfortable win.
Yet the hosts came back into the game and looked the better side for a large part of the match, with Chelsea having to thank Kepa for keeping the scoreline down.
The game ended in a 3-3 draw and Tuchel was understandably unhappy with the performance as it reminded him of a 3-2 defeat against West Ham last weekend.
“I think we had a very good first 15 minutes but we stopped doing the things we did,” he said after the game.”
“I had the feeling, and this is my opinion, that we forgot why we were the better team. And once this drops, once we start managing results, we get punished.
“We start playing balls back, not attacking with the same aggression and hunger than before. We got punished twice and it is for me the level of investment we have to do right no matter what is on the scoresheet.
“My analysis is very clear: our behavior changes when we have a lead and this is something we’ve never done and should never do. The challenge is to close the door and minimize the possibility.
“We need a higher level of sprints, runs, concentration levels. The basics need to be pushed while we are in the lead. They can’t drop when we are in the lead. It’s not the big picture.”