Controversy over Nike's hyper-advanced Vaporfly shoes that some say give runners an unfair advantage boosts performance of some of the sportswear giants' rivals.
The Duke star Zion Williamson sprained his right knee when his Nike shoe broke apart in the first minute of a game between Duke University and North Carolina.
Adidas is selling only 500 pairs of the shoes for $220 (180 euros) each, that have a season ticket valid for 2018 sewn into the tongue of the shoes, normally worth $890 (730 euros).
Subscribe to our Youtube channel for all latest in-depth, on the ground reporting from around the world.
Copyright © 2020 TRT World.