Classic "old dog vs up and comer" match up, and yet another installment of the Mexico vs. Puerto Rico rivalry. Marquez is one half of the best brother duo's in all of combat sports (forget those giant oafs who rely on being giant coupled with a jab and occasional right). Lopez has fast hands is a good pressure fighter, but he's just a little too hittable. Marquez is a about as complete as you can be as far as boxing goes, except he relies on timing instead of hand speed. I'm going with the old dog in this one, he'll catch Lopez eventually although he may have to weather a storm.