The Spaniard is confident he can do even better under manager Jose Mourinho.
"Individually it is the same, the last few games I feel very sharp, very well," he told chelseafc.com.
"It's about work, working hard and feeling the belief of the staff, the belief of the players in ourselves and I feel the belief I have in myself.
"The more important games of the season are still to come."
The World Cup winner enjoys the competition for places.
"We have three very good strikers and hopefully all of us can score goals," the 29-year-old added.
"When I play I hope to score goals and when Samuel and Demba (Ba) play they have to score as well, so this competition is very healthy."
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