junior laded plenty of leather on zbik who stood in front of him. chavez before the manfredo fight wasn't known as a guy with a big punch. my question is how did he develop such big bang in a short space of time.
Honestly did you see Zbik throw over 900 punches? Martinez was tired and there was a few headclashes involved prior to the knockdown.
Chavez hit him flush and hit him hard...Sergio didn't go down "because of his knee" or "because he was tired", he went down because Junior hit him with three flush shots that hurt him. I mean you could see in his eyes when he got up that he was hurt...
It was a clean hard shot, but the tiredness didn't help. Plus I think Sergio thought he had Chavez beaten, broke and tired. Nobody expected Chavez to land a solid punch,, especially one that would hurt Sergio the way it did (the follow up punches helped him down too) "it's the ones you don't see that hurt the most". So it was a combination of things, plus as someone mentioned earlier, punching power can come from sweet timing and accuracy
Eleven rounds of nonstop movement. Even if you've had strong core of stamina built up from playing soccer and bicycling in early adulthood and then professionally boxing for several years, at the age of 37 you're going to gas from eleven rounds of nonstop movement and punching. Zbik sucks, but has a solid chin, and didn't compromise himself by gassing out. Martinez is ten times the boxer Zbik is, and also has a solid chin, but something had to give after eleven rounds of what he'd been doing.
Chavez Landed 37 power punches in the last round, almost a third of the power punches that he landed in the entire fight. He caught Martinez with 3 clubbing lefts in quick succession and just before then he landed some big rights. Chavez has also grown a lot in the past 2 years and can be over 180lbs in the ring now. Extra weight extra power. Chavez showed impressive KO power by stopping Lee in his last bout to prove how his punch power has improved as his size has increased. Chavez still does not possess one punch KO power though and even though he landed on a dazed Martinez he could not get him out of there.
Martinez was caught completely flush, and he was proabably pretty ****ing tired at that point....having said that, while he was obviously very hurt, Junior technically still did throw/muscle Martinez to the floor (though perhaps prior to this the ropes held him up) Martinez got up and took flush shot after flush shot after that and didn't go down I think it was largely due to exhaustion, at the time he was KD he was going for the KO himself