Watch MAYWEATHER vs MARQUEZ Live on HBO Boxing

Watch MAYWEATHER vs MARQUEZ Live! Unbeaten Floyd Mayweather Jr. will make his celebrated return to the ring Sept. 19, the rescheduled date for his 12-round welterweight showdown against Juan Manuel Marquez at the MGM Grand in Las Vegas.

The HBO Pay-Per-View fight, billed as "Number One/Numero Uno," had originally been set for July 18 before Mayweather (39-0, 25 KOs) suffered a rib injury in training that forced a postponement. The fight will now take place in conjunction with Mexican Independence Day, traditionally a big boxing weekend.