We've all heard the saying: Speed kills, but timing can negate speed. And in my opinion, the best example of this was Marquez-Pacquiao I. Marquez shut down Pacquiao's speed with his great sense of timing.
I feel that if Marquez hadn't been knocked down 3 times in the first round, he would have won the fight.
Ingo was very light on his feet as well. But he knew how to time that right hand. A more obscure one would be John Michael Johnson v Junior Jones.
Greg Haugen used a mixture of excellent timing, grit, and conditioning to negate an almost cartoonish advantage in hand and foot speed on Hector Camacho's part. Of course it helped that Camacho was a total space case at that point.
Shane Mosley vs Vernon Forrest. Forrest said it in the postfight interview how to beat a fighter with more speed: a (well timed) jab over and over again
Come on. That's a wildly pointless thing to say. If Marquez didn't get dropped three times, he'd have had to have fought smarter and better than he actually did in reality, so the counterargument to that would be "if Pacquiao had knocked him down more times after the 1st round, he would have won the fight", ie: he'd have had to fight smarter and better than he actually did in reality. The fight happened, one judge made a scoring error, and so we got a draw. It is what it was.
PS: I didn't think this was a particularly good example of timing negating speed. If you watch that fight, Pacquiao is still very raw and very predictable in '04. I haven't watched the fight in years, but I'm sure I recall Pacquiao throwing the same one-two about eight times in succession after dropping Marquez. Thus, I don't think Marquez had to deal with a bona fide speedster attacking him in a variety of ways, he simply negated Pacquiao's limited attacking movements by doing the right things. I'd say their 2nd and 3rd fights were better examples of this, as Pac is more varied then and uses his speed better, not just throwing the same punches all the time. Although of course even then JMM didn't truly 'negate' the speed, because he got hit a lot and the fights were all close. I think a great example of someone 'negating' speed should be a fight where the slower fighter was in complete control and won emphatically.