Who would win in a fight between superman and doctor who?

My money is on Doctor Who. He is older and much more experienced than Superman. Doctor Who has yet to be defeated by any of his enemies. Plus, even if he would get mortally wounded for any reason, he could regenerate.
In the words of Doctor Who himself, ". . . just remember who's standing in your way. Remember every black day I ever stopped you, and then . . . and then . . . do the smart thing: Let somebody else try first."