Fantasy (possibly YA?) where there is a man that is fused with a god that allows him to perform as a boxer. Also has a woman that is half dragon. POV is shared between the boxer, the woman, and the woman’s father.

[Reader]

I read this book years ago, and I desperately want to own a copy now but no amount of googling has helped so far.

[Reader]

I believe that the cover had the image of some sort of fantasy city on it, but that is hazy and can possibly not be true. I believe that the father of the woman was a professor of some sort.