Following Sunday's trip to Old Trafford, Chelsea travel to Roots Hall to face Southend in their third-round replay.
Coach Luiz Felipe Scolari blamed his side's lack of cutting edge for not finishing off Steve Tilson's side before Peter Clarke stooped to head a shock equaliser in the 90th minute, and striker Salomon Kalou, who opened the scoring for the Premiership side, agreed they should have put the game beyond the Shrimpers.
Kalou said: "If you score the first goal and you don't then kill the opponent, they can always come back and that is what happened against Burnley [in the Carling Cup] and that is what happened in this game as well. They pressed well and they tried to put us in trouble and that is what they did. Of course when you have the opportunity to kill the game and go to the next round and you draw at home, it is never a good result so everyone is a bit frustrated. Now we have the match there and we have to go there and do better. It will be a difficult game away because they will be pushed by their fans, but I am confident that we can go there and beat them so we have to be really focused - but the most important, first, is Manchester next Sunday. I have not been playing for a while so for me to start was nice and to score has given me more confidence. I hope that I will get more opportunities to play."