I really like this because (as someone said) Uschi really DID like to fight. And Pam Grier was both mentally tough, and physically strong.
So this would be like the battle between immovable force and undeniable power. Neither would give an inch. This fight could (literally) last for days - with the requisite short breaks for water and power bars. Eventually one of two things would happen:
a) they'd both be too exhausted to continue and agree to take a few months off to recover and then resume;
b) one of them would break.
Personally, I'm hoping for a) but I can see either as a real possibility.