The NBA has banned a pair of basketball boots over fears they will allow players to jump too high.
Basketball stars will no longer be able to wear Athletic Propulsion Labs' Concept 1 shoes, which claim to allow athletes to jump up to nine centimetres higher due to a spring-based system in the soles.
The firm had claimed to be in talks with dozens of NBA players about wearing the shoes, but could not reveal names due to the players' endorsement deals.
The shoes are the first to be banned for giving an unfair performance advantage in the 64-year-history of the NBA.
However a Nike Air Jordan design was banned 25 years ago for flouting rules insisting that basketball boots had white soles.