A look back at rounds 1-5 of their first encounter shows that Diaz came out charging and dictating the pace. Marquez vs. Diaz II takes place Sat., July 31 live on pay-per-view. For more information, visit br Watch HBO Boxing events online at HBO GO® br With HBO GO, you can watch HBO Boxing events on your iPad® (), iPhone® () or Android™ () smartphone. Free with your HBO subscription through participating TV providers.