Thomas Tuchel was at a loss to explain why his team made so many mistakes in the 4-2 defeat to Arsenal.

The losses to Real Madrid and Brentford were due to individual errors from the previously reliable defence.

Eddie Nketiah scored the first and Emile Smith Rowe the second, but Cesar Azpilicueta gave away a late penalty for holding onto Buk, and the game ended in a 2-2 draw.

The opener is a problem for his side in reference to, but also for creating problems from situations when they should have been in control.

It was a wild and open game in the first half and we came back twice. We had a good start but gave the first goal away, which is hard to do in a row. We are doing it. We scored two more in the second half for the wrong side.

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Chelsea vs Arsenal
FREE TO WATCH: Highlights from Arsenal’s win against Chelsea in the Premier League.

It is impossible at this level of mistakes, the number of mistakes in consecutive games here at home. You don't see it. We are doing this at the moment and you cannot win football games like this.

The pitch is very difficult to play on and it may sound like an excuse, but it is. It is not in our favor. The ball bounces in front of him when he wants to play it. We made the same mistake against Real Madrid that cost us the next round of the competition, and this one cost us the next match. I don't recall when we got two goals like this.

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A very dejected Thomas Tuchel said there were too many dramatic mistakes in Chelsea’s performance as they were beaten 4-2 by Arsenal at Stamford Bridge.

It is an unbelievable goal from our possession. There aren't any tactics behind that. In ten seconds, we have three ball losses. We do a foul where there is no danger at all. We foul a person, it is a penalty, and we don't have enough time to get an equalization. What can we do to analyse? There is nothing to analyse.

Two times this month, Tuchel's Chelsea have conceded three or more goals. They only did that once before in his entire reign, and the absence of regulars Antonio Rudiger and Thiago Silva starting the match on the bench does not explain it.

The answer to the question is that we conceded seven goals with Toni. It is not about individual players.

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Cesar fan confrontation
Emotions ran high at full-time of Chelsea's 4-2 defeat to Arsenal as club captain César Azpilicueta confronted a fan.

It is doubtful that I had the tactics right, and the team selection right. When they do it for the last three matches, they get a lot of praise. It is impossible to win matches if you make this many mistakes. It is simply impossible. I don't see it in any other matches, but I see it in our games and it has to stop.

Hasselbaink: Lukaku display not good enough for Chelsea; 'show desire'

The display of record signing Romelu Lukaku simply wasn't up to scratch according to Jimmy Floyd Hasselbaink.

The Belgian was making his first start in the league since February but never looked like ending his goalless streak, which dates back to December, and was taken off after an hour.

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The Belgian was called on to show more desire after he was said to have failed to reach the required level.

Tuchel is very disappointed. I don't think he wants to be too critical of individuals, but I think he is disappointed in certain individuals.

I don't understand why he's talking about the pitch because there are two teams playing on it. If you look at the game, the team was well under par.

They were not good enough for a team that should be challenging for the title. You still play for your pride, even though they can't be No1 anymore.

Lukaku, you have not had the best of seasons, you get an opportunity to show someone you are the man. Show that you really want it. Show that desire. I did not see it.

I want him to do well, this team needs a No9. Kai Havertz came in and he ran left, right and centre, he wanted the ball. He is trying but not everything is coming off. I am not seeing that from him.

I'm not saying everything is his fault, but he's leading the line and doing some more.