Sonny Liston/Muhammad Ali 2 was extremely disappointing.

Rocky Marciano/Joe Walcott 2 was extremely disappointing.

I thought Patterson/Liston was disappointing, both fights. Same way you can say Frazier/Foreman and Norton/Foreman were disappointing. Wanted to see Floyd and Joe do a bit better than that as Champions of the World. as for Ken he always got blown out by the big bombers: Shavers, Foreman, Cooney. but gave fits to the great boxers like Ali and Holmes.

Another disappointing fight was Tyson/Holyfield 2 as has been mentioned above.

Also Klit/Lennox was disappointing as it was left hanging and unresolved really.