Olympic 100m hurdles champion Brianna McNeal has been given a five-year ban from athletics for breaking anti-doping rules.

An Athletics Integrity Unit disciplinary tribunal found McNeal guilty of “tampering within the results management process”.

McNeal, 29, won gold at the 2016 Rio Games and was world champion in 2013.

The American has appealed against the decision to the Court of Arbitration for Sport (Cas).

The appeal will be heard before this summer’s Tokyo Games and McNeal