brianna mcneal, has been banned for five years for an anti—doping rule violation. the athletics integrity unit said the american had been sanctioned for what they call "tampering within the results management process". the 29—year—old won gold at the 2016 rio games and was world champion in 2013. mcneal has appealed to the court of arbitration of sport. former world champion hurdler dai greene says his attempt to qualify for this summer's olympics is being hampered by coronavirus restrictions. if i'm being totally honest, i think my chances of getting slimmer all the time. the competition i had in france was, you know, perfect weather, but i wasn't there. the one in switzerland was a bit of a wreck, again, inaudible. i'm pretty much