Chelsea paid the price for missed chances as League OneSouthend grabbed a last minute goal to earn a 1-1 draw in the FA Cup at Stamford Bridge. Kalou headed home Frank Lampard's corner in the 31st minute but a stoppage time header from Peter Clarke gave United a deserved third-round replay.

Blues boss Luiz Felipe Scolari hinted that his players were suffering a crisis of confidence in front of goal.

"I need to teach to my players more concentration when they arrive in front of goal.

"This is my job every day. Maybe it is confidence when they arrive in front of goal, maybe pressure. They need to score more goals and get more confidence. Only this.

"If they are not together, they would not create 15 chances. We played very well and created 15 chances but only one goal.

"Southend played hard and very spirited for a draw. They got a draw but only had one shot on goal.

"Carlo Cudicini didn't make one save. Not scoring is our mistake. All the players feel the same as me."

Scolari reiterated that he will not buy a new striker and pledged to work harder on the training ground instead.

"We need to follow the same ideas - train, train, train," said Scolari. "I don't need another striker. I have a good squad, good players.

"We are still in the cup. Other teams that lost today are out, we are not out. We were better than Southend but didn't score a second goal."