I'll go with an easy one.
Jones vs Gustafsson IMO
Ronda seemed to think she could beat anyone
Gus was a huge underdog for that one IIRCThat one totally took me off guard. I was sure Jones was going to just mop the floor with him.
I thought the fact that Ngannou openly said he doesn't train wrestling or jitsu going into a championship fight was seriously laughable.
DefinitionRockhold Vs Bisping 2
Isn't that the definition of underestimating?
I made money on the gsp/serra fightGSp is the best example of looking past an opponent and underestimating with disastrous results
Is there any close examples of this magnitude??