Just watching these two fights, George Chuvalo really pushed Muhammad Ali hard. And actually made there 2nd fight quite close, i used to think Muhammad Ali would be too big and would just dance around and outbox Rocky Marciano.
But after seeing how a similar fighter aka George Chuvalo, gave Muhammad Ali such a tough time. I've slightly changed my opinion on the matter, George Chuvalo may of been a bit bigger. But he didn't hit as hard as Rocky Marciano so that even's it up and both men had amazing chins and amazing will.