Yes and it happens...due to fear of the unknown...Some fighters duck because they don't know what's going to happen, Some duck because they know EXACTLY what's going to happen

Lennox Lewis retired rather than face Vitali again (watch that fight, Lennox was getting owned but Vitali's cutman couldn't stop the bleeding.

Sturm wen to court to avoid fighting the MANDATORY challenger Gennady Golovkin because Sturm is a bitch who pisses his pants anytime he sets foot outside of Germany or fights anyone with a decent KO percentage

And who can forget the Floyd/Pac deal...oh he don't wanna take a drug test...oh he does? Then he need to take an unfair flat fee rather than the 55% to me, 45% to him that he offered...