A simple vista el aumento de masa muscular en el mexicano Juan Manuel Márquez es considerable. Brazos gruesos y abdomen bien marcados, son imposibles de ocultar.

Durante su entrenamiento público, el boxeador nativo de la Ciudad de México mostró los adelantos obtenidos en casi dos meses de preparación para lo que será la cuarta pelea ante el filipino Manny Pacquiao, a quien enfrentará el 8 de diciembre en el MGM Grand de Las Vegas, Nevada.

"Pacquiao dice que será una ventaja el músculo que he desarrollado para esta pelea. Pero se va a sorprender. Hace una semana empezamos a trabajar la agresividad explosiva y eso marcará la diferencia arriba del ring. Llegaré tan rápido como siempre. Listo para la guerra", dijo a HuffPost Voces el peleador de 39 años.

En lo que calificó será la pelea más importante de su carrera, pues se le volverá a brindar la oportunidad de demostrar que en las tres peleas anteriores fue "víctima de malas decisiones", Juan Manuel asegura que no se quedará con las ganas y buscará ese nocaut que haga que el referí le levante por fin el brazo.

"Pacquiao tiene un método. Entre pelea y pelea busca que pase el mayor tiempo posible. Entre la primera y segunda pelea esperó cuatro años y luego cuatro más para la tercera. Esta vez presioné mucho más para obtenerla lo más pronto posible, pues al parecer Manny espera que yo me oxide para obtener una victoria fácil", acusó el mexicano que en el balance de las peleas ante el oriental tiene un empate y dos derrotas, todas ellas con polémica incluida.

Márquez aseguró que han realizado una gran preparación, pues saben que Pacquiao necesita un nocaut para alejar de su carrera la sombra de las tres peleas anteriores.

"Conocemos a Pacquiao demasiado bien, mejor que nadie. Sabemos como pelearle y ganarle. Estoy convencido de que hemos sido superiores, pero ahora vamos por una victoria que no deje dudas", finalizó el peleador que se encuentra en la etapa final de su preparación y que dijo se trasladará a Las Vegas una semana antes del duelo.

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  • Juan Manuel Marquez, Karina Gonzalez

    Juan Manuel Marquez, right, poses for photos with Miss Mexico Karina Gonzalez during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Marquez is scheduled to face off against Manny Pacquiao in a welterweight fight boxing match on Saturday. Gonzalez is competing in next week's Miss Universe pageant in Las Vegas. (AP Photo/Julie Jacobson)

  • Janin Tugonon

    Miss Philippines Janine Tugonon poses for photos during a news conference for Manny Pacquiao and Juan Manuel Marquez, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao and Marquez are scheduled to face off in a welterweight boxing match on Saturday. Tugonon is in Las Vegas for next week's Miss Universe pageant. (AP Photo/Julie Jacobson)

  • Manny Pacquiao, Janine Tugonon

    Manny Pacquiao, left, poses for photos with Miss Philippines Janine Tugonon during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao is scheduled to take on Juan Manuel Marquez in a welterweight boxing match on Saturday. Tugonon is scheduled to compete in the Miss Universe pageant on Dec. 19. (AP Photo/Julie Jacobson)

  • Manny Pacquiao

    Manny Pacquiao listens to comments during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao is scheduled to take on Juan Manuel Marquez in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez, Manny Pacquiao

    Manny Pacquiao, left, and Juan Manuel Marquez pose for photos during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao and Marquez are scheduled to face off in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Manny Pacquiao, Freddie Roach

    Manny Pacquiao, right, and manager Freddie Roach react to comments during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao is scheduled to take on Juan Manuel Marquez in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez

    Juan Manuel Marquez listens to comments during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Marquez will be taking on Manny Pacquiao in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Manny Pacquiao, Juan Manuel Marquez

    Manny Pacquiao plays to supporters during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao is scheduled to take on Juan Manuel Marquez in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez, Manny Pacquiao

    Manny Pacquiao, left, and Juan Manuel Marquez, right, pose for photos during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao and Marquez are scheduled to face off in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez, Manny Pacquiao, Janine Tugonon, Karina Gonzalez

    Manny Pacquiao, left, and Juan Manuel Marquez, right, pose for photos with Miss Universe contestants Miss Philippines Janine Tugonon, second from left, and Miss Mexico Karina Gonzalez during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao and Marquez are scheduled to face off in a welterweight boxing match on Saturday. The Miss Universe contest is scheduled to take place in Las Vegas on Dec. 19. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez, Manny Pacquiao, Janine Tugonon, Karina Gonzalez

    Manny Pacquiao, left, and Juan Manuel Marquez, right, pose for photos with Miss Universe contestants Miss Philippines Janine Tugonon, second from left, and Miss Mexico Karina Gonzalez during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao and Marquez are scheduled to face off in a welterweight boxing match on Saturday. The Miss Universe contest is scheduled to take place in Las Vegas on Dec. 19. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez, Manny Pacquiao, Janine Tugonon, Karina Gonzalez

    Manny Pacquiao, left, and Juan Manuel Marquez, right, pose for photos with Miss Universe contestants Miss Philippines Janine Tugonon, second from left, and Miss Mexico Karina Gonzalez during a news conference, Wednesday, Dec. 5, 2012, in Las Vegas. Pacquiao and Marquez are scheduled to face off in a welterweight boxing match on Saturday. The Miss Universe contest is scheduled to take place in Las Vegas on Dec. 19. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez

    Juan Manuel Marquez, left, signs autographs for fans upon arriving at the MGM Grand hotel-casino, Tuesday, Dec. 4, 2012, in Las Vegas. Marquez is scheduled to face Manny Pacquiao in a welterweight boxing match Saturday. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez

    Juan Manuel Marquez listens to questions from reporters upon arriving at the MGM Grand Hotel-Casino, Tuesday, Dec. 4, 2012, in Las Vegas. Marquez is scheduled to face Manny Pacquiao in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez

    Juan Manuel Marquez, center, poses for photos upon arriving at the MGM Grand Hotel-Casino, Tuesday, Dec. 4, 2012, in Las Vegas. Marquez is scheduled to face Manny Pacquiao in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Juan Manuel Marquez

    Juan Manuel Marquez, left, signs autographs for fans upon arriving at the MGM Grand Hotel-Casino, Tuesday, Dec. 4, 2012, in Las Vegas. Marquez is scheduled to face Manny Pacquiao in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Manny Pacquiao

    Manny Pacquiao greets fans during his arrival at the MGM Grand Hotel-Casino, Tuesday, Dec. 4, 2012, in Las Vegas. Pacquiao is scheduled to face Juan Manuel Marquez in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Manny Pacquiao

    Manny Pacquiao listens to questions from the media during his arrival at the MGM Grand hotel-casino, Tuesday, Dec. 4, 2012, in Las Vegas. Pacquiao is scheduled to face Juan Manuel Marquez in a welterweight fight on Saturday. (AP Photo/Julie Jacobson)

  • Manny Pacquiao

    Manny Pacquiao, center, steps off the bus during his arrival at the MGM Grand hotel-casino, Tuesday, Dec. 4, 2012, in Las Vegas. Pacquiao will face Juan Manuel Marquez in a WBO welterweight fight on Saturday. (AP Photo/Julie Jacobson)

  • Manny Pacquiao

    Manny Pacquiao, center, enters the ring in the lobby of the MGM Grand Hotel-Casino during his arrival, Tuesday, Dec. 4, 2012, in Las Vegas. Pacquiao is scheduled to face Juan Manuel Marquez in a welterweight boxing match on Saturday. (AP Photo/Julie Jacobson)

  • Manny Pacquiao

    Manny Pacquiao, center, poses for photos with fans during his arrival at the MGM hotel-casino, Tuesday, Dec. 4, 2012, in Las Vegas. Pacquiao is scheduled to face Juan Manuel Marquez in a welterweight fight on Saturday. (AP Photo/Julie Jacobson)

  • Manny Pacquiao

    Manny Pacquiao jumps rope while training in Los Angeles, Monday, Dec. 3, 2012. Pacquiao is scheduled to fight Juan Manuel Marquez in a welterweight boxing match in Las Vegas on Saturday. (AP Photo/Damian Dovarganes)

  • Manny Pacquiao

    Manny Pacquiao gestures for members of the media as he trains in Los Angeles, Monday, Dec. 3, 2012. Pacquiao is scheduled to fight Juan Manuel Marquez in a welterweight boxing match in Las Vegas on Saturday. (AP Photo/Damian Dovarganes)

  • Pacquiao arribó a Los Angeles

  • Pacquiao arribó a Los Angeles

  • Pacquiao arribó a Los Angeles

  • Juan Manuel Marquez,

    Boxer Juan Manuel Marquez listens during during a news conference in New York, Wednesday, Sept. 19, 2012. Marquez and Manny Pacquiao are promoting their fourth fight, scheduled for Dec. 8, 2012 in Las Vegas. (AP Photo/Seth Wenig)

  • Manny Pacquiao

    Boxer Manny Pacquiao listens during during a news conference in New York, Wednesday, Sept. 19, 2012. Paquiao and Juan Manuel Marquez are promoting their fourth fight, scheduled for Dec. 8, 2012 in Las Vegas. (AP Photo/Seth Wenig)

  • Gira promocional Manny Pacquiao vs Juan Manuel Márquez 4

  • Gira promocional Manny Pacquiao vs Juan Manuel Márquez 4

  • Gira promocional Manny Pacquiao vs Juan Manuel Márquez 4

  • Gira promocional Manny Pacquiao vs Juan Manuel Márquez 4

  • Manny Pacquiao, Freddie Roach

    Manny Pacquiao, of the Philippines, right, and his trainer Freddie Roach talk with reporters at a news conference to promote his upcoming boxing match against Juan Manuel Marquez in Beverly Hills, Calif., Monday, Sept. 17, 2012. The two will fight for the fourth time on Dec. 8 in Las Vegas. (AP Photo/Reed Saxon)

  • Manny Pacquiao, Freddie Roach

    Manny Pacquiao, of the Philippines, right, and his trainer Freddie Roach laugh at a news conference to promote his upcoming boxing match against Juan Manuel Marquez in Beverly Hills, Calif., Monday, Sept. 17, 2012. The two will fight for the fourth time on Dec. 8 in Las Vegas. (AP Photo/Reed Saxon)

  • Juan Manuel Marquez

    Juan Manuel Marquez, of Mexico, talks to reporters to promote his upcoming boxing match against Manny Pacquiao at a news conference in Beverly Hills, Calif., Monday, Sept. 17, 2012. The two will fight for the fourth time on Dec. 8 in Las Vegas. (AP Photo/Reed Saxon)

  • Juan Manuel Marquez, Manny Pacquiao , Freddie Roach, Ignacio Beristain

    Boxers Juan Manuel Marquez, second from right, and Manny Pacquiao, second from left, pose for pictures with their trainers, Freddie Roach, left, and Ignacio Beristain during a news conference in New York, Wednesday, Sept. 19, 2012. The boxers are promoting their fourth fight, scheduled for Dec. 8, 2012 in Las Vegas. (AP Photo/Seth Wenig)