Probably a little hopeful to expect those type of numbers now. They've dragged it out too long. If it breaks the all-time record it will have done well. Don't know how people came up with that 4 million number anyway. The biggest fights in this PPV age, both heavyweight and non-heavyweight, have done in the vicinity of 2-2.4 million buys in the US. It may just be there are only 2-2.5 million people in the US who care about the sport enough that they would pay to watch a boxing fight.