Did anyone else notice the similarities between never back down and the Karate Kid?

When I saw never back down a while ago i thought it was a good movie and then I saw karate kid just recently and remembered that pretty much the whole story line was the karate kid just different martial arts. These guys fight over a girl, and end it in a %26quot;tournament%26quot; Are there any other similar movies this way? if they are what happened to originality.|||lol, i never thought about that but its true. i guess its just the time honored tradition of alls fair in love and war.