Should have been
1. Zoro vs Sanji
2. Roger vs Whitebeard
3. Buggy vs Luffy
4. Enel vs Crocodile
Nothing wrong with taking advantage of your foes carelessness, and besides there is probably a swords man rule against turning your back on the enemy before making sure he's dead. So 10- sword guy points for Zoro
Because every time I slice someone into pieces I go ahead and think "HMM WAIT THIS GUY MIGHT HAVE A DEVILS FRUIT THAT LETS HIM BE SLICED UP".