At least one dictionary defines "Tour de force" as "an exceptional achievement by an artist, author, or the like, that is unlikely to be equaled by that person or anyone else." as "an exceptional achievement by an artist, author, or the like, that is unlikely to be equaled by that person or anyone else."

Can you name two (and only two) fights (per post) that meet this definition?

1) I'll start with Benn's performance vs Gman

2) Buster Douglasl's performance vs. Tyson