Chelsea midfielder Cole Palmer concedes their draw with Burnley was unacceptable.
Palmer scored twice, once from the spot for the 2-2 draw.
"That simply can't happen," Palmer told chelseafc.com. "To go in front against 10 men and then lose the lead, at home, it's just not good enough.
"The dressing room is really down because we know we should go on and win this game when they go down to 10 men, especially at home.
"It's a similar story if we are being honest. We have to take responsibility and improve on this as players.
"We fashioned many chances but couldn't put them away and at the other end, there were times where we were sloppy in our defensive work. It's just really disappointing not to win the game.
"I think we switched off too many times all over the pitch, especially for their goals. That can't happen and if we are going to improve as a team, we need to find some consistency.
'Overall we need to sharpen up in both boxes. We need to be solid in defence and become more clinical at the other end."
He added: "On a personal level I'm pleased to have scored two goals but if you don't get the three points, it doesn't mean much. I want to be scoring goals that help us to wins first and foremost.
"We need to find that consistency as I said earlier and we've got another game just around the corner on Thursday. We need to stick together and keep fighting for those wins."