Khan has speed which would be a problem for Marquez overall, but even more now that he is 39. I believe he would be outboxed similar to when he fought gayweather. Khan moving around the ring would also pose a problem for Marquez; the only advantage I see for Marquez is his timing and his effective counterpunching. He might be able to land a big shot on his glass chin but I just don't think he'd have the youth to KO him. So to conclude: I'd say Khan would win by decision.

If Marquez was able to handle Pac's speed and power in four fights (including a ko in the last), I don't know why people think Khan would trouble him. Khan barely survived against Julio Diaz ffs. People have to accept the fact that he isn't elite. Bradley has the tools to present a tougher challenge.

Marquez by TKO or KO, Khan has no chin and Marquez is a master counter puncher. He knows how to time speed effectively.

Marquez would prevail by UD or TKO in the late rounds because of experience, smarts and ring savvy.

if marquez suRvives past khans early speed and aggression he wins late/pts

Marquez schools him

I think Khan is overhyped, however he would win because of his youth. Khan has no chance against mayweather

jmm is a counter puncher but aint that great... he got pac cuz pac has a poor defense, plus the tremendous power he attained from heredia... and he's an old man now at 40

while khan, though having a weak chin possesses the speed enough to evade that power rights and steal every round till the last bell...