Fights in which a fighter purposely punished or toyed with his opponent?

[Sleepwalker]

Lennox seemed to be taking his time with Tyson. I felt like Mike was ready to go a few rounds before Lennox pulverized him with that HUGE right.

Steward was screaming at Lewis between rounds to finish him off. I think Lennox could still feel power as he was always very cautious and could bore as well as Wlad does now.

I think Lewis' caution had more to do with him being psychologically affected by his fluke knockouts at the hands of Oliver McCall and Hasim Rahman (more recent).

[ruthless rocco]

Larry Holmes versus that old guy in 1980.

Larry Holmes ..... "It was the easiest fight I ever had. Including when I was a little kid."

[Master]

Calzaghe v Jones Jr
Jack Johnson v Ketchell

[jon09]

Roy Jones vs Pazienza, Brannon, Grant, Harmon, Frazier and Hall. Most of Roys fights in his prime. Mayweather vs Bruseles.