Chelsea boss Jose Mourinho warned his team that they need to become more ruthless after suffering his first defeat since returning to Stamford Bridge against Everton.
The London side was left to rue missed opportunities away to the Toffees as they missed a chance to claim top spot on the log going down 1-0.
Blue’s Debutant Samuel Eto’o was the main culprit after wasting a handful of opportunities, the most clear- cut when Everton debutant Gareth Barry’s last- ditch tackle saving a definite goal for the visitors.
"We didn't score goals. We had chances and didn't score," Mourinho said. "People with experience in football, we all know this happens week after week. If you don't score, what you create means nothing.
"If they don't have [killer instinct] they have to get it. Samuel was a killer all his career. Even so, the situations where he was involved in the game makes me happy."
"I don't think it is a question of sharpness," he said. "Andre Schurrle's pass gives time for Barry to come, if it is a fast ball, boom, Eto'o scores. Maybe one day we have three chances, we score three goals, we win 3-0. We had 21 shots, nine on target.
"Before they scored a goal, we had easy chances. Eto'o's is an easy one. The other one, Schurrle over the bar is an easy one.
"Eto'o's header is an easy one. Ramires in the second half is not a difficult one. The players are good so sooner or later we will score goals."
It was a deserved win which represented Everton boss Roberto Martinez's first in the league since replacing David Moyes. They remain unbeaten and, on this evidence, look capable of continuing the progress they made under Moyes.
"It's difficult to describe. It wasn't the perfect performance but we showed great character," Martinez said. "The crowd understood we are still adapting and trying to play in a different manner.
"The way we defended was immense and I thought we always carried a good threat. It was one of those performances where I couldn't be prouder. It gives us a great platform to become much better."
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