I'd say Ali 1965 is pretty much unbeatable, super fast hand & footwork and that nasty killer instinct was at it's peak plus he was by no means a tiny heavyweight either.
1965 was only a year before he put on the best "clinic" i have ever seen from a Heavyweight in what is widely acknowledged as his best performance.
Ali was on FIRE against Williams.
I could watch this all day long - Electrifying
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