Boxing fans still hoping to see Manny Pacquiao and Errol Spence square off in the ring ... don't give up hope just yet, 'cause the legendary pugilist tells us he's down to scrap with the 31-year-old once he's healed up.
Of course, 42-year-old Pacquiao and Spence -- the IBF and WBC welterweight champ -- were scheduled to box August 21 in Las Vegas ... but doctors discovered Errol had a torn retina -- a serious eye injury -- during pre-fight medical evaluations.
But, the fight isn't dead just yet.