A 1-0 loss to Everton continued their shaky end-of-season form and threatens to drag them back to Tottenham and Arsenal in the fight for Champions League places.
Tuchel slammed his defense for another costly mistake which handed Richarlison the winning goal just after half-time.
But it was a day when his attack let him down once again – even though it took the genius of Jordan Pickford to get Everton over the line.
Tuchel said: “I said several weeks ago that I don’t feel safe and we’re never safe. By the way, if we’re in a race for the top one, the top two or the top four, whatever the race, the last four games to have only four points will never be enough, whatever the race we are in.
“We have to take care of ourselves. At the moment we don’t get points when we play well and deserve more and we lose when we play well. It’s a bad mix. »
Cesar Azpilicueta was taken into possession by Richarlison, who fired the winner early in the second half.
Tuchel saw his side dominate possession against Manchester United and Everton in the space of three days, but his side managed just one goal and one point in those games.
He insists the problem is in defence, not attack.
“We knew what was coming and like the last few matches we struggled to get clean sheets,” he said. “In the last four we had one, against West Ham, it’s the only victory we have and I’m very disappointed.
“What can I do? The ball is free, giving a goal away is the worst thing that can happen to you in this atmosphere. It happens too often. We struggle to play without big mistakes and that’s why we fight for results.
On his attack, he added: “If there is something I can do I will try it, but if I knew I would have done it before.
“For me the key is to have a clean sheet. Manchester United was a different game. More open, fluid. We finally scored late and cashed straight away.
“For me it’s more like the game against West Ham and we had a clean sheet and played without any big mistakes and that gives us the chance to score late.
“If you install emotion and confidence in a stadium like this, you struggle.”
Everton fans tried to deter Chelsea by setting off fireworks outside the Liverpool Hilton hotel where they were staying on Saturday night.
Tuchel said they didn’t affect him.
“Personally, I woke up twice at 1am and 3am for a minute and after the noise. I rolled over and continued to sleep.