Willian has warned Chelsea they risk dropping out of the top four if they don’t start learning their lesson.
The Blues twice let a one-goal lead slip away against ten-man Arsenal to draw 2-2 after Hector Bellerin scored a late equaliser on Tuesday night.
And Willian admits it was another mess of their own making, with Emerson wasting a chance to put the ball out of play while Tammy Abraham was hobbling around injured in the dying stages.
The Chelsea winger said: “At that moment when it was 2-1 and Tammy was on the floor, we have to put the ball out. But we continued to play.
“We have to learn from these situations. Because this cannot happen any more. If we put the ball out, then they have to stop the game.
“I think that we have to put it out and then we see what we can do. This is not an excuse. We have to learn from these mistakes, because if you want to stay at the top, we have to learn.
“I don’t know if it is concentration. We have to see what we can improve. To stay in the top four we have to win games, so now is the time to see which part of the game we have to improve.
“I think we have to be careful. If we don’t then maybe at the end of the season we will be out of the top four. We have time, so now it is time to improve.”
Chelsea had a six-point lead over Manchester United and Wolves at the close of play but have only managed one win in their last four league games.
Arsenal struck late to secure a draw against Chelsea
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And their home record has been poor, with defeats at the Bridge to the likes of Bournemouth, West Ham and Southampton highlighting a big problem.
Willian said: “We have to improve at home, and we have to be more stable, win more games. We played well, but we had difficulties trying to press them when we were 1-0 up.
“In the second half we controlled the game until we conceded the…