By now, there's nothing Manny Pacquiao and Juan Manuel Marquez don't know about each other. After 36 rounds in the ring - many of which could have been scored either way - there's not much fight fans don't know about the two, either.
They'll probably do 12 more rounds Saturday night, and if their three previous fights were any indication, the decision will be close. If styles make fights, their styles make for fights that can confound the ringside judges just as much as they do the people who pay to watch.
So what's the intrigue of fight No. 4? What reason do fight fans have other than the possibility of Marquez finally winning to spend money that for a fight that could be as predictable as the other three?
Maybe just because there's a good chance you'll never see the two ring generals battle each other again.
''I think this is the last fight with him,'' Pacquiao said.
''Last time,'' agreed trainer Freddie Roach. ''We're going to knock him out. End of story.''
That might prove...