Hmmm, this would be quite, erm, difficult to answer. But, as soon as I saw this thread, I went and looked at some random antomy of the two animals, and I'd really have to say LIONS would win against Wolves fight-wise.
Of course though, this would depend on weither or not the lion was male, what it's age was, etc.. this of course, goes for a wolf aswell. But, if this was an young adult lion or, simply an adult lion. (Either Gender) The Lion would easily win.
Lions and Lionesses not only are usually larger than MOST Wolves, b Not to mention that,ut they also are able to use claws in battle- yes, children, wolves can use claws to fight larger enemies, though, they are MUCH LESS efficient than that of a Lion's.
Lions also have larger teeth, and more than often, much bigger and more powerful muscles. Canines have much smaller teeth and, not only do they usually have less-powerful muscles, but they're body mass is also smaller.
Now, I know that there are wolves out there that are HUGE, simply IMMENSE compared to most 'normal' wolves. But, Lions would most likely win even if they were against THOSE.
I'm speaking of One-Wolf on One-Lion, just to let you know. If this was a pack of wolves against one lion, well, they might have chance, but only a chance. Alot of them in the pack would probaly be killed or wounded.