Castillo and Corrales 1 in that round that Diego came back and stopped castillo after he had been floored twice. That is definitely one of the greatest rounds I can remember period ....
Gatti and ward round 9
another great round to look at is Vince Phillips and Kostya tzsyzu in the round that Phillips stopped kostya tzsyuh that was an exciting around as well.
And believe it or not a very scary hi-anxiety round was Ali vs Foreman round 1.