Could Mayweather vs McGregor Join the Biggest Sports Flops in History?

It wouldn't be the first time ticket demand failed to meet expectations
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Floyd Mayweather vs Conor McGregor has been hyped as a dream matchup but it wouldn't be the first time ticket demand failed to meet expectations.

Could it join these 4 events on the list of the biggest sports flops in history? 

Is your portfolio about to be eclipsed?