Pacquiao said to the sports.inquirer.net “I intend to attack him, pressure him.”
In his sparring sessions, Pacquiao has been overwhelming his less talented sparring partners in short four round sparring events. However, going all out in short sparring against over-matched sparring partners isn’t going to be the same as what Pacquiao will be dealing with on Saturday night against Marquez. He’s not a sparring partner, and this isn’t going to be a four round fight.
If Pacquiao goes all out in the first four rounds, he’s likely to gas out in the second half of the fight like he did against Tim Bradley last June and possibly lose.