Juan Manuel Marquez has admitted that he feels he needs to produce the "perfect fight" to defeat Manny Pacquiao on Saturday night.
Pacquiao secured a controversial points victory over the Mexican in their third bout last year and Marquez wants to take a judges' decision out of the equation by stopping his Filipino opponent.
Marquez told BBC World Service: "I am looking for the knockout. I have trained really hard and I feel ready.
"I am looking for the knockout because the judges gave another decision [when we last met]. I need to do a perfect fight."
The 39-year-old has won 54 of his 61 professional fights.
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