Michael Phelps was surprisingly slow in the 400-meter individual medley prelims Saturday. He barely made the field and will swim in Lane 8 in the final.

No big deal, right? All lanes are the same.

Not exactly, according to a tweet from former Olympic swimmer Summer Sanders: "Lane 8 is worse than Lane 1 because Phelps breathes to the right on the way home. He won't see the rest of the field."

—Jon Krawczynski — Twitter: http://www.twitter.com/APKrawczynski

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