The late rounds of Marquez vs. Diaz I opened with the younger and seemingly stronger Diaz taking control until the experience of the grizzled veteran Marquez started to take effect. 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.