Yeah but if fighters never moved up or down we wouldn't have seen Hatton headbutting a turnbuckle, norr would we be even talking about a potential Mayweather - Pacquiao fight.
I don't see the worry with Marquez fighting Khan. At 135 he knocked out two of the best fighters. It only looked a struggle because he didn't box. Khan only moved up to 140 for a title shot. It's not like he was too big for the weight. Marquez doesn't have to come in at 140. He can give away 3 or 4 pounds and it won't really matter. Marquez ios more than capable of knocking Khan out. Even at 147 he landed clean on Mayweather. If he lands on Khan like that, it's lights out.
At the end of the day it's night, and Marquez is the best fighter at 135. Khan apparently is nowhere near the best fighter at 140. I fail to see how you see Marquez as being too small to compete with Khan.
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