Diego Costa is blaming himself and his fellow Chelsea players for their slow start.

Chelsea is currently 16th in the table.

"We know we're not in the form we were supposed to be at the beginning of the season," he said. "We need to blame the players because we came back from holiday very confident, thinking we could go back into how it was last season, and then realised the team was already in a bad situation.

"I'm going to be very honest: Maybe a few weeks ago, five or six weeks ago, I was not on top of my game. At least physically," Costa said.

"Maybe I got out of my diet and, when I came back, I was not the way I was supposed to be. I was a little bit overweight. That affected my game. You can be selfish and blame it on the manager but I'm not going to do that.

"I'm responsible 100 percent, and so are the other guys. So all we can do now is train very hard and work very hard to try to get back to that level where we were the season before."