However, Zenit star Magomed Ozdoyev scored a 94th-minute equaliser to earn the Russian side a point.
The goal had strong consequences for the West London side. It allowed Juventus to climb above them into first place in Group H.
“I think we had a very good first 15 minutes but we stopped doing the things we did,” Tuchel added.
“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.
“It happened against West Ham and today. The reaction is good because it shows that it’s not about what we can do.