No call...
In your scenario, neither player had initial control. If one player is able to secure control, (s)he cannot be penalized if there was no advantage gained through contact. Let 'em play, I say.
There's lots of situations in a game where there "seems like there's gotta be something", but there isn't. Making this distinction is tough a lot of the time. That's why, I believe, it's one of the things that separate the very good officials from the good officials.
Like I always say....
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HOMER: Just gimme my gun.
CLERK: Hold on, the law requires a five-day waiting period; we've got run a background check...
HOMER: Five days???? But I'm mad NOW!!
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