Chelsea manager Thomas Tuchel bemoaned his team's mistakes against Arsenal at Stamford Bridge on Wednesday.
The Blues went down 4-2 in front of their home supporters, with Eddie Nketiah scoring a brace for Arsenal.
Tuchel's side also copped four goals by Brentford at home recently, and the German was unhappy when speaking after the game.
He told reporters: "It was a totally wild and open game in the first half – already a 2-2 after we came back twice.
"We had a good start but again gave the first goal away, which is impossible to do these things in consecutive matches. But we're doing it. We came back twice, and we scored another two in the second half, unfortunately for the wrong side.
"It's a level of mistakes, the number of mistakes in consecutive games here at home, it's impossible at this kind of level. You don't see this. It's simply impossible, but we're doing this at the moment, and you cannot win football games like this."
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