Hmm so fantasy one on one combat? I'm not sure I've seen anything paricularly designed for it but you probably wouldn't go far wrong using the Warhammer Fantasy conversion of Inquisitor called Witch Hunter. These are available here. Inquisitor isn't bad for one on one combat, three or four combatants makes for a lot more interest though.
A while back my group had a lot of fun doing 1-on-1 pit fights using the Mordheim rules
there was also a Mordheim Pit-fighter game that used a hex grid available online - I'll see if I have a PDF of the rules
Suggested gaming music for pit fights:
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~The ravings of a single mad Goblin is bad enough, but such a power-hungry, malice-filled creature as Mortis can never hope to be understood~
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~The ravings of a single mad Goblin is bad enough, but such a power-hungry, malice-filled creature as Mortis can never hope to be understood~