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Tatyana McFadden stars in Nike ad before Chicago Marathon

Tatyana McFadden goes for No. 23 in Chicago.

The world’s most successful marathoner over the last five years not only stars in Sunday’s race in the Windy City (8 a.m. ET, Olympic Channel: Home of Team USA) — which she has won seven straight times, a portion of her 22 career World Marathon Major victories — but is also present in Nike Running’s campaign ahead of it.

“I never saw myself as a person with a disability,” McFadden said in a video published Monday. “I always saw myself as a champion.”

Nike’s tagline: If you think you can’t run a marathon, win one.