Doping in spotlight on eve of World Athletics Championships with two runners banned
Cas bans US sprinter Erriyon Knighton for four yearsEthiopia’s Diribe Welteji ineligible pending case appealDoping in track and field has been thrust back into the spotlight on the eve of the World Athletics Championships after the US sprint star Erriyon Knighton was banned for four years and the Ethiopian Diribe Welteji was declared ineligible to run in …