well, not literally ZERO percent, but a VERY LOW percent chance of ending in a KO/TKO.
1. Winky/Spinks
2. Hopkins/Sturm
3. Whitaker/Mayweather
4. Tyson/Frazier (kidding)
hopkins-sturm might have resulted in a tko years ago when bhop was more agressive....
how about:
winky -ouma
chazz witherspoon - eddie chambers
ishe smith - sergio mora
joe calzaghe - librado andrade (zag's lack of power + zag's speed and ability not to get hit with anything librado throws + andrades chin)