Chelsea suffered three successive home defeats for the first time since 1993.
The Blues were beaten 4-2 at home by Mikel Arteta’s men this midweek and also lost to Brentford and Real Madrid earlier in the month of April.
“It’s unusual and I don’t know what it is,” Tuchel said in a press conference.
“If it was just the one thing, we would switch dressing rooms or take another hotel. But that would maybe be more superstition than anything else,” the Chelsea boss added.
“I have no solution but it’s also not the level that we want to produce in home games. It’s a bit fragile at the moment.”
Tuchel claims that the pitch condition of Stamford Bridge has not helped his side which in turn has contributed to Chelsea’s poor home record.
“The first goal was from Andreas but it was because of a funny bounce,” Tuchel said.
“It was awkward to calculate the speed and bounce of the ball. I know everybody’s working hard in every department to provide the best level.
“We are struggling a bit with the timing of the renewal [of the grass] this season. This leads to a bit of the problem.
“The pitch wasn’t where it should and could be at the beginning of the season.”