Chelsea interim manager Guus Hiddink says his side lost concentration after the first 10 minutes of the game against West Ham United.
The Blues had to battle hard to take one point from yesterday's game as they continue to struggle to move closer to the Top Four.
"We started well in the first 10 minutes but we then started losing the possession too easily," Hiddink is quoted as saying by BBC Sport.
"We reacted just before half-time, especially with the beautiful Cesc Fabregas free-kick. In the second half we got caught on the counter, but we reacted perfectly to get the draw.
"This is a very good West Ham side.
"They are knocking on the door for the top four. I was happy with the late penalty decision. It's difficult for me to make a judgement - I think he was tripped on the line. On the line is part of the box."