DAVID GREENE, HOST:

Good morning. I'm David Greene. It was the first lap of a muddy men's cycling race in Belgium, and competitors faced an unexpected challenger.

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UNIDENTIFIED PERSON: He's got a leash on, but he lost his owner. Going for it right now - in third place, somebody's dog.

GREENE: Somebody's dog - appeared to be a German shepherd. Riders pedaled past the dog as it tried to take a bite out of some bikes. In the end, two wheels beat four legs. The dog was eventually caught and disqualified. Transcript provided by NPR, Copyright NPR.