Thomas Tuchel insists Chelsea's defence can't rely on Antonio Rudiger.

The Blues went down 4-2 against Arsenal at Stamford Bridge on Wednesday night.

They have now conceded eight goals in their last three Premier League matches.

Rudiger performed well against the Gunners, but Tuchel says it means nothing if the team concedes goals.

Asked about Rudiger's performance, Tuchel said: "We conceded seven goals with Toni against Brentford and Real Madrid, that answers the question.

"It's not about individual players. A defensive performance is a team performance, and an offensive performance is a team performance. You need to have the tactics right, which is doubtful I had this right, and you need the team selection right, again it's doubtful I had this right.

"Then it's a game for the players. They get full praise when they do it when they did it for the last three matches.

"And they have to face the reality that it's impossible to win matches if you make this amount of mistakes of this calibre. It's simply impossible. I don't see it in any other matches, but I see it now in consecutive matches of our games, and it has to stop."

When pressed on why his team have been conceding so many goals, Tuchel replied: "Look at the penalty, and it is an unbelievable goal from our ball possession.

"There are no tactics behind that. We have three ball losses in ten seconds. Then we do a foul where there's not even the slightest danger. We foul a person, it is a penalty, and we rob ourselves of six minutes for an equaliser. What is there to analyse? There's nothing to analyse.

"It must be something, but it is also possible to don't do it because we proved it in the last three matches, and we thought we learned our lesson from Brentford and Real Madrid but obviously not."